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Immobilisation of chromium in magnesium carbonate minerals Mineral. Mag. (IF 2.7) Pub Date : 2024-03-06 Alicja M. Lacinska, Keith Bateman, Simon Chenery, Simon J Kemp, Thomas Liddy, Jeremy C Rushton, Dipankar Saha, Sven L.M. Schroeder
Hexavalent chromium (Cr6+) is a toxic carcinogenic pollutant that might be released by the mining and processing of ultramafic rocks and nickel laterites and which requires permanent removal from the contaminated biosphere. Ultramafic material can also serve as a feedstock for the sequestration of CO2 resulting from the growth of new minerals, raising the intriguing proposition of integrated sequestration
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Similarities and differences among selected gemmological varieties of chalcedony: chemistry, mineralogy and microstructure Mineral. Mag. (IF 2.7) Pub Date : 2024-02-16 Sara Monico, Marco Cantaluppi, Valeria Diella, G. Diego Gatta, Ilaria Adamo, Patrizia Fumagalli, Nicoletta Marinoni
This study describes a new variety of chalcedony with a unique inhomogeneous bluish green hue, named aquaprase. It was discovered in Africa and is considered to be a valuable addition to the gem trade. A multi-methodological approach was used to examine its chemistry, mineralogy and microstructure, which were then compared to those of chrysoprase and agate, two of the most popular varieties of chalcedony
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Dmitryvarlamovite, Ti2(Fe3+Nb)O8, a new columbite-supergroup mineral related to the wolframite group Mineral. Mag. (IF 2.7) Pub Date : 2024-02-01 Oksana V. Udoratina, Taras L. Panikorovskii, Nikita V. Chukanov, Mikhail V. Voronin, Vladimir P. Lutoev, Atali A. Agakhanov, Sergey I. Isaenko
The new columbite-supergroup mineral dmitryvarlamovite, ideally Ti2(Fe3+Nb)O8, was discovered in weathered alkaline metasomatic assemblages formed after late Riphaean sedimentary carbonate rocks of the Verkhne-Shchugorskoe deposit, Middle Timan Mts., Russia. The associated minerals are columbite-(Fe), pyrochlore-group minerals, monazite-(Ce), xenotime-(Y), baryte, pyrite, drugmanite and plumbogummite
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Naalasite, NaAl(AsO3OH)2⋅H2O, the Al analogue of nafeasite from the Torrecillas mine, Iquique Province, Chile Mineral. Mag. (IF 2.7) Pub Date : 2024-01-22 Anthony R. Kampf, Gerhard Möhn, Chi Ma, Joy Désor
The new mineral naalasite (IMA2023–027), NaAl(AsO3OH)2⋅H2O, was found at the Torrecillas mine, Iquique Province, Chile, where it is a secondary alteration phase associated with anhydrite, juansilvaite, magnesiokoritnigite and a lavendulan-like phase. Naalasite occurs in tightly intergrown aggregates and druses of equant crystals. Crystals are light to medium pink and transparent, with vitreous lustre
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Arsenoústalečite, Cu12(As2Te2)Se13, a new mineral, and crystal structures of arsenoústalečite and stibioústalečite Mineral. Mag. (IF 2.7) Pub Date : 2024-01-10 Jiří Sejkora, Cristian Biagioni, Pavel Škácha, Silvia Musetti, Daniela Mauro
Arsenoústalečite is a new mineral discovered in a sample collected from the abandoned Ústaleč deposit near Horažďovice, SW Bohemia, Czech Republic. It occurs as rare anhedral grains, up to 40 μm in size, in a calcite gangue, associated with stibioústalečite, hakite-(Hg), berzelianite and uraninite. Arsenoústalečite is dark grey, with a metallic lustre. Mohs hardness is ca. 3½–4; calculated density
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Complexity in the Au–Ag–Hg system: New information from a PGE (‘osmiridium’) concentrate at Waratah Bay, Victoria, Australia Mineral. Mag. (IF 2.7) Pub Date : 2023-12-13 William D. Birch, Chi Ma
Au–Hg–Ag phases have been described from a variety of metallogenic orebodies and the placer deposits derived from them. In many documented placer deposits, the phases typically occur intergrown as ‘secondary’ rims to primary Au–Ag grains. The origin of these rims has been ascribed to supergene redistribution reactions during deposition or to the effects of amalgamation (i.e. use of mercury) during
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Guangyuanite, Pb3Cl3(Se4+O3)(OH), a new lead chloride selenite mineral from the El Dragón mine, Potosí, Bolivia Mineral. Mag. (IF 2.7) Pub Date : 2023-12-07 Hexiong Yang, Xiangping Gu, James A. McGlasson, Ronald B. Gibbs, Robert T. Downs
A new mineral species, guangyuanite, ideally Pb3Cl3(Se4+O3)(OH), was discovered from the El Dragón mine, Antonio Quijarro Province, Potosí Department, Bolivia. It occurs as equant crystals. Associated minerals are Co-bearing krut'aite–penroseite, chalcomenite, schmiederite, olsacherite, phosgenite, anglesite, cerussite and franksousaite. Guangyuanite is pale yellow–brown in transmitted light, transparent
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Characterisation, axial anisotropy, and formation conditions of celestine minerals from the Jabal Eghei (Nuqay) late Neogene – Pleistocene volcanic province, southeastern edge of the Sirt Basin, southern Libya: Constraints on the mineralogical geothermometer Mineral. Mag. (IF 2.7) Pub Date : 2023-11-28 Pavle Tančić, Maja Milošević, Darko Spahić, Bojan Kostić, Aleksandar Kremenović, Maja Poznanović-Spahić, Jovan Kovačević
Five celestine crystals were sampled from the (palaeo)surface intervening between the late Miocene to Pleistocene basaltic sequences of the Jabal Eghei (Nuqay) volcanic province in southern Libya and then characterised by applying a combination of the SEM–WDS, ICP/OES, PXRD and IR methods. Colour variations and related minerogenetic frameworks were also investigated. Three samples have greenish-blue-to-blue
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Bimbowrieite, NaMgFe3+5(PO4)4 (OH)6⋅2H2O, a new dufrénite-group mineral from the White Rock No.2 quarry, South Australia, Australia Mineral. Mag. (IF 2.7) Pub Date : 2023-11-13 Peter Elliott, Anthony R. Kampf
Bimbowrieite, NaMgFe3+5(PO4)4(OH)6⋅2H2O, is a new mineral found in a mineralogically zoned rare-element bearing pegmatite at the White Rock No.2 quarry, Bimbowrie Conservation Park, South Australia, Australia. Crystals are dark olive green to greenish brown and are bladed with dimensions of up to 150 μm. Crystals occur as aggregates up to 0.4 mm across associated with ushkovite, bermanite, leucophosphite
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A new mineral cuprodobrovolskyite Na4Cu(SO4)3 from the Tolbachik volcano (Kamchatka, Russia) and relationships in the family of natural anhydrous Na–Cu sulfates Mineral. Mag. (IF 2.7) Pub Date : 2023-11-13 Nadezhda V. Shchipalkina, Igor V. Pekov, Natalia N. Koshlyakova, Dmitry I. Belakovskiy, Natalia V. Zubkova, Atali A. Agakhanov, Sergey N. Britvin, Maria A. Nazarova
A new mineral cuprodobrovolskyite, ideally Na4Cu(SO4)3, was found in sublimates of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. It is associated with petrovite, saranchinaite, euchlorine, krasheninnikovite, langbeinite, calciolangbeinite, anhydrite, sanidine, tenorite and hematite. Cuprodobrovolskyite
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Okruginite, Cu2SnSe3, a new mineral from the Ozernovskoe deposit, Kamchatka peninsula, Russia Mineral. Mag. (IF 2.7) Pub Date : 2023-10-16 Anna Vymazalová, Vladimir V. Kozlov, František Laufek, Chris J. Stanley, Ilya A. Shkilev, Sharapat Kudaeva, Filip Košek
Okruginite, Cu2SnSe3 is a new mineral discovered from the high-sulfidation epithermal Au Ozernovskoye deposit, Kamchatka peninsula, Russia. It occurs as distinct Se-rich zones in Se-bearing mohite crystals or forms aggregates of small crystals 10–15 μm in size in quartz. In plane-polarised light, okruginite appears brownish grey. Pleochroism and bireflectance are discernible, anisotropy is weak, with
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Tellurium-rich stibiogoldfieldite and Se-bearing dantopaite from Goldfield, Nevada, USA: new crystal chemical data Mineral. Mag. (IF 2.7) Pub Date : 2023-10-16 Silvia Musetti, Jiří Sejkora, Cristian Biagioni, Zdeněk Dolníček
Cotype material of stibiogoldfieldite from the Mohawk mine, Goldfield, Nevada, USA, has been examined in order to collect single-crystal X-ray diffraction data of Te-rich stibiogoldfieldite and to characterise the associated Ag–Bi–(S,Se) phase. Tellurium-rich stibiogoldfieldite, with empirical formula (Cu11.30Ag0.03)Σ11.33(Sb0.80As0.57Bi0.06Te2.57)Σ4.00(S12.83Se0.20)Σ13.03, is cubic, space group I$\bar{4}$3m
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The oxidation state and distribution of Fe in pumpellyite from the Northern Chichibu Belt in the Hijikawa district, western Shikoku, Japan Mineral. Mag. (IF 2.7) Pub Date : 2023-10-16 Masahide Akasaka, Yumi Goishi (Imaizumi), Masayuki Sakakibara, Yoshihiro Nakamuta
Intracrystalline distribution of ferrous and ferric iron within pumpellyites (VIIW8VIX4VIY8IVZ12O56–n(OH)n, Z = 1) from low-grade metamorphic green rocks of the Kanogawa unit in the Northern Chichibu Belt, Hijikawa district, western Shikoku, Japan, was investigated using electron microprobe analysis, X-ray Rietveld refinement, and 57Fe Mössbauer spectroscopic analysis to verify the regularity of the
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Kalyuzhnyite-(Ce), NaKCaSrCeTi(Si8O21)OF(H2O)3, a new mineral from the Darai-Pioz alkaline massif, Tien-Shan mountains, Tajikistan: mineral description, crystal structure and a new double (Si8O21) sheet Mineral. Mag. (IF 2.7) Pub Date : 2023-10-13 Atali A. Agakhanov, Elena Sokolova, Vladimir Yu. Karpenko, Frank C. Hawthorne, Leonid A. Pautov, Anatoly V. Kasatkin, Igor V. Pekov, Vitaliya A. Agakhanova
Kalyuzhnyite-(Ce), ideally NaKCaSrCeTi(Si8O21)OF(H2O)3, is a new mineral from the Darai-Pioz alkaline massif, Tien-Shan mountains, Tajikistan. It occurs as equant grains up to 0.05 × 0.07 mm in a quartz–pectolite aggregate in a silexite-like peralkaline pegmatite. Associated minerals are quartz, fluorite, pectolite, baratovite, aegirine, leucosphenite, neptunite, reedmergnerite, orlovite, sokolovaite
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Letnikovite-(Ce), (Na□)Ca2Ce2[Si7O17(OH)]F4(H2O)4, a new mineral from the Darai-Pioz alkaline massif, Tajikistan: mineral description, crystal structure and a new single [Si7O17(OH)] sheet Mineral. Mag. (IF 2.7) Pub Date : 2023-10-09 Atali A. Agakhanov, Elena Sokolova, Fernando Cámara, Vladimir Yu. Karpenko, Frank C. Hawthorne, Leonid A. Pautov, Anatoly V. Kasatkin, Igor V. Pekov, Vitaliya A. Agakhanova
Letnikovite-(Ce), ideally (Na□)Ca2Ce2[Si7O17(OH)]F4(H2O)4, is a new mineral with no natural or synthetic analogues (IMA2022–132). The mineral occurs at the Darai-Pioz alkaline massif, Tien-Shan mountains, Tajikistan, in a silexite-like peralkaline pegmatite. Letnikovite-(Ce) occurs as isolated prismatic grains up to 0.03 × 0.1 mm in a quartz–pectolite aggregate. Associated minerals are quartz, fluorite
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Secondary uranyl arsenates–phosphates and Sb–Bi-rich minerals of the segnitite–philipsbornite series in the oxidation zone at the Prakovce-Zimná Voda REE–U–Au quartz-vein mineralisation, Western Carpathians, Slovakia Mineral. Mag. (IF 2.7) Pub Date : 2023-10-04 Martin Ondrejka, Štefan Ferenc, Juraj Majzlan, Martin Števko, Richard Kopáčik, Bronislava Voleková, Stanislava Milovská, Jörg Göttlicher, Ralph Steininger, Tomáš Mikuš, Pavel Uher, Adrián Biroň, Jiří Sejkora, Alexandra Molnárová
This work is an investigation of the assemblages of supergene minerals occurring in hydrothermal REE–U–Au quartz-vein mineralisation at the Prakovce-Zimná Voda site, Slovakia. Heterogeneous uranyl arsenates and minor phosphates of the autunite group (nováčekite, kahlerite, threadgoldite, autunite, arsenuranospathite and chistyakovaite) together with scorodite and Sb–Bi-rich philipsbornite–segnitite-series
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A re-evaluation of stannopalladinite using modern analytical techniques Mineral. Mag. (IF 2.7) Pub Date : 2023-09-20 Anatoly V. Kasatkin, Anna Vymazalová, Fabrizio Nestola, Vladislav V. Gurzhiy, Atali A. Agakhanov, Radek Škoda, Dmitry I. Belakovskiy, Mikhail E. Generalov
An investigation of sample 41647 from the Platinum Placer of Ugol'nyi Ruchei, Norilsk Cu–Ni deposit, Russia, stored in the systematic collection of the Fersman Mineralogical Museum, revealed that it contained a mineral that can be identified as the original stannopalladinite described in 1947. As the literature information on the latter is controversial, the mineral was re-investigated using modern
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Can lithium contents in mica be correctly calculated? Tischendorf́s proposal (Mineralogical Magazine 61/1997) 25 years after Mineral. Mag. (IF 2.7) Pub Date : 2023-09-18 Karel Breiter, Michaela Vašinová Galiová, Zuzana Korbelová, Michaela Hložková
Micas are the most common hosts of lithium in granitoid igneous rocks. Unfortunately, their Li contents cannot be determined by electron-probe microanalysis (EPMA) which is the most common method of mineral analysis. In an effort to avoid the use of other, technically more complex and expensive methods, several empirical schemes for the estimation of Li-contents from EPMA data have been developed.
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Narsarsukite in peralkaline granites from the Papanduva Pluton, Graciosa Province, south Brazil: Insights from textural and compositional features Mineral. Mag. (IF 2.7) Pub Date : 2023-09-12 Silvio R.F. Vlach, Frederico C.J. Vilalva
We report textural and compositional data for the titanosilicate narsarsukite [Na2(Ti,Fe3+)Si4(O,F)11] in peralkaline granites from the Papanduva Pluton in Graciosa Province, south-southeastern Brazil. Two distinct narsarsukite generations, one late magmatic and the other post-magmatic, were identified on the basis of textural and compositional features. The magmatic generation consists of larger,
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Ferric iron in chrome-bearing spinels: implications for microprobe correction procedures Mineral. Mag. (IF 2.7) Pub Date : 2023-09-12 Hugh Rollinson, Jacob Adetunji
We investigated the compositions of a suite of 361 chrome-bearing spinels from spinel peridotites, ophiolitic mantle chromitites and from layered igneous intrusions in which the Fe2+/Fe3+ ratio has been determined by Mössbauer spectroscopy. We explore the crystal-chemical controls on the distribution of Fe3+ and on mineral stoichiometry with regard to electron-probe correction procedures for estimating
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The trace-element compositions of amphibole, magnetite and ilmenite as potential exploration guides to metamorphosed Proterozoic Cu–Zn±Pb±Au±Ag volcanogenic massive sulfide deposits in Colorado, USA Mineral. Mag. (IF 2.7) Pub Date : 2023-09-11 Paul G. Spry, Edward H. Berke, Dan Layton-Matthews, Alexandre Voinot, Adriana Heimann, Graham S. Teale, Anette von der Handt
Orthoamphibole, clinoamphibole and magnetite are common minerals in altered rocks associated spatially with Palaeoproterozoic volcanogenic massive sulfide (VMS) deposits in Colorado, USA and metamorphosed to the amphibolite facies. These altered rocks are dominated by the assemblage orthoamphibole (anthophyllite/gedrite)–cordierite–magnetite±gahnite±sulfides. Magnetite also occurs in granitoids, banded
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Deynekoite, Ca9□Fe3+(PO4)7 – a new mineral of the merrillite group from phosphide-bearing contact facies of paralava, Hatrurim Complex, Daba-Siwaqa, Jordan Mineral. Mag. (IF 2.7) Pub Date : 2023-09-11 Evgeny V. Galuskin, Marcin Stachowicz, Irina O. Galuskina, Krzysztof Woźniak, Yevgeny Vapnik, Mikhail N. Murashko, Grzegorz Zieliński
Deynekoite, Ca9□Fe3+(PO4)7 (R3c, a = 10.3516(3)Å, c = 37.1599(17)Å, V = 3448.4(3)Å3 and Z = 6), a new mineral of the merrillite group was found in the contact facies of paralava of the Hatrurim Complex in the Daba-Siwaqa pyrometamorphic rock field, Jordan. The paralava, consisting of diopside, tridymite, anorthite, wollastonite and fluorapatite, is enriched in Fe-bearing phosphides and phosphates at
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Minasgeraisite-(Y) discredited as an ordered intermediate between datolite and hingganite-(Y) Mineral. Mag. (IF 2.7) Pub Date : 2023-09-01 Daniel Atencio
Minasgeraisite-(Y) is discredited on the basis of it being an ordered intermediate between datolite and hingganite-(Y) (IMA-CNMNC Proposal 23-F). An idealised formula is (Ca2Y2)□2(Be2B2)Si4O16(OH)4, which corresponds to Ca2□B2Si2O8(OH)2 (datolite) + Y2□Be2Si2O8(OH)2 (hingganite-(Y)). The type material is rich in Bi, the Bi-richest portion yet discovered from the type locality is shown to be an intermediate
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Structure and thermal expansion of end-member olivines I: Crystal and magnetic structure, thermal expansion, and spontaneous magnetostriction of synthetic fayalite, Fe2SiO4, determined by high-resolution neutron powder diffraction Mineral. Mag. (IF 2.7) Pub Date : 2023-08-25 Evangelia K. Tripoliti, David P. Dobson, A. Dominic Fortes, Andrew R. Thomson, Paul F. Schofield, Ian G. Wood
The lattice parameters and the crystal and magnetic structures of Fe2SiO4 have been determined from 10 K to 1453 K by high-resolution time-of-flight neutron powder diffraction. Fe2SiO4 undergoes two antiferromagnetic phase transformations on cooling from room temperature: the first, at 65.4 K, is to a collinear antiferromagnet with moments on two symmetry-independent Fe ions; the second transition
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Crystal chemistry of zemannite-type structures: IV. Wortupaite, the first new tellurium oxysalt mineral described from an Australian locality Mineral. Mag. (IF 2.7) Pub Date : 2023-08-24 Owen P. Missen, Stuart J. Mills, Joël Brugger, William D. Birch, Peter Elliott
Wortupaite (IMA2022–107) is a new hydrated magnesium nickel tellurite mineral with a zemannite-like structure, described from the Wortupa gold mine, South Australia, Australia. Wortupaite forms needles up to 25 μm in length, generally clustered and sometimes in blocky masses of shorter (10‒15 μm) crystals. Wortupaite is found growing on melonite, from which the component nickel and tellurium are derived
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Mangani-eckermannite, NaNa2(Mg4Mn3+)Si8O22(OH)2, a new amphibole from Tanohata Mine, Iwate Prefecture, Japan Mineral. Mag. (IF 2.7) Pub Date : 2023-08-10 Anatoly V. Kasatkin, Natalia V. Zubkova, Atali A. Agakhanov, Nikita V. Chukanov, Radek Škoda, Fabrizio Nestola, Dmitry I. Belakovskiy, Igor V. Pekov
Mangani-eckermannite, ideally NaNa2(Mg4Mn3+)Si8O22(OH)2, is a new member of the amphibole supergroup found at Tanohata Mine, Shimohei District, Iwate Prefecture, Japan. It occurs as prismatic crystals up to 0.3 × 0.2 mm and their aggregates up to 1 mm intergrown with braunite, vittinkiite and quartz. Mangani-eckermannite is cherry-red to very dark red and reddish-brown in thicker grains. It is translucent
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Magmatic and post-magmatic evolution of the Newania carbonatite complex, Rajasthan, north-western India Mineral. Mag. (IF 2.7) Pub Date : 2023-08-08 Amritpaul Singh, Roger H. Mitchell, Gurmeet Kaur, D. Srinivasa Sarma
This work describes the mineralogy of dolomite carbonatite occurring at the Newania carbonatite complex, Rajasthan, north-western India. The mineralogy records the textural and compositional features of magmatic and post-magmatic stages of carbonatite evolution. Ferroan dolomite is the principal constituent and displays variable degrees of deformation, ranging from brittle-to-ductile deformation regimes
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Ferriandrosite-(Ce), a new member of the epidote supergroup from Betliar, Slovakia Mineral. Mag. (IF 2.7) Pub Date : 2023-08-07 Martin Števko, Pavol Myšľan, Cristian Biagioni, Daniela Mauro, Tomáš Mikuš
A new member of the epidote supergroup, ferriandrosite-(Ce), ideally MnCeFe3+AlMn2+(Si2O7)(SiO4)O(OH), was found at the Július manganese ore occurrence near Betliar, Rožňava Co., Košice Region, Slovakia. It occurs as subhedral grains and polycrystalline aggregates, up to 0.3 mm in size, enclosed in pyroxmangite. Other associated minerals are spessartine, rhodochrosite, quartz, baryte and pyrosmalite-(Mn)
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Physical properties and crystal structure of near end-member oxy-dravite from the Beluga occurrence, Nunavut territory, Canada Mineral. Mag. (IF 2.7) Pub Date : 2023-08-07 Lenka Skřápková, Jan Cempírek, Philippe M. Belley, Lee A. Groat, Radek Škoda
Oxy-dravite, ideally Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3(O), was found in a composition near its ideal end-member at the Beluga occurrence, Nunavut territory, Canada. It occurs in retrograde albite–muscovite–corundum–calcite domains in a calc-silicate rock. This uncommon oxy-dravite occurs as dark brown, equant to short-prismatic, idiomorphic crystals with vitreous lustre and up to ca. 4 × 3 cm in
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Fluoralforsite, Ba5(PO4)3F – a new apatite-group mineral from the Hatrurim Basin, Negev Desert, Israel Mineral. Mag. (IF 2.7) Pub Date : 2023-07-31 Arkadiusz Krzątała, Katarzyna Skrzyńska, Georgia Cametti, Irina Galuskina, Yevgeny Vapnik, Evgeny Galuskin
Fluoralforsite, ideally Ba5(PO4)3F, (space group P63/m (#176), Z = 2, a = 10.0031(2) Å, c= 7.5382(2) Å and V = 653.23(3) Å3), is a new mineral species of the apatite group – a Ba-analogue of fluorapatite and a F-analogue of alforsite. It was discovered in rankinite paralava filling cracks in pyrometamorphic gehlenite hornfels near the tributary of wadi Zohar and Gurim Anticline, Hatrurim Basin, Negev
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Minerals with a palmierite-type structure. Part I. Mazorite Ba3(PO4)2, a new mineral from the Hatrurim Complex in Israel Mineral. Mag. (IF 2.7) Pub Date : 2023-07-31 Rafał Juroszek, Irina Galuskina, Biljana Krüger, Hannes Krüger, Yevgeny Vapnik, Volker Kahlenberg, Evgeny Galuskin
The new mineral mazorite, ideally Ba3(PO4)2, a P-analogue of gurimite Ba3(VO4)2, was discovered in rankinite paralava hosted by the massive gehlenite-bearing pyrometamorphic rocks of the Hatrurim Complex in Israel. It has also recently been discovered in xenolith samples from the Bellerberg volcano in Germany. Holotype mazorite usually forms colourless plate-like crystals up to 70–100 μm in length
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Rewitzerite, K(H2O)Mn2(Al2Ti)(PO4)4[O(OH)](H2O)10⋅4H2O, a new monoclinic paulkerrite-group mineral, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany Mineral. Mag. (IF 2.7) Pub Date : 2023-07-24 Ian E. Grey, Rupert Hochleitner, Anthony R. Kampf, Stephanie Boer, Colin M. MacRae, William G. Mumme, Erich Keck
Rewitzerite, K(H2O)Mn2(Al2Ti)(PO4)4[O(OH)](H2O)10⋅4H2O, is a new monoclinic member of the paulkerrite group, from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, Germany. It was found in specimens of altered zwieselite, in association with rockbridgeite. Rewitzerite forms clusters of colourless elongated hexagonal-shaped prisms, up to 0.1 mm long. The crystals are flattened on {010} and elongated
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Minerals with a palmierite-type structure. Part II. Nomenclature and classification of the palmierite supergroup. Mineral. Mag. (IF 2.7) Pub Date : 2023-07-24 Rafał Juroszek, Biljana Krüger, Hannes Krüger, Irina Galuskina
The palmierite supergroup, approved by the IMA-CNMNC, includes five mineral species characterised by the general crystal-chemical formula XIIM1XM22(IVTO4)2 (Z = 3). On the basis of the crystal-chemical arguments and heterovalent isomorphic substitution scheme M++T6+ ↔ M2++T5+, the palmierite supergroup can be formally divided into two groups: the palmierite group M12+M22+(T6+O4)2, and the tuite group
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Aluminotaipingite-(CeCa), (Ce6Ca3)Al(SiO4)3[SiO3(OH)]4F3, a new member of the cerite-supergroup minerals Mineral. Mag. (IF 2.7) Pub Date : 2023-07-03 Italo Campostrini, Francesco Demartin, Giuseppe Finello, Pietro Vignola
Aluminotaipingite-(CeCa), (Ce6Ca3)Al(SiO4)3[SiO3(OH)]4F3, is a new member of the cerite-supergroup minerals, whose general chemical formula is A9XM[TO3Ø]7Z3, (A = REE, Ca, Sr, Na and □; X = □, Ca, Na and Fe2+; M = Mg, Fe2+, Fe3+, Al and Mn; T = Si and P; Ø = O and OH; Z = □, OH and F). It was found in cavities of a leucogranitic orthogneiss at the Casette quarry, Montoso, Bagnolo Piemonte, Cuneo Province
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Occurrence and crystal chemistry of austinite, conichalcite and zincolivenite from the Peloritani Mountains, northeastern Sicily, Italy Mineral. Mag. (IF 2.7) Pub Date : 2023-07-03 Daniela Mauro, Cristian Biagioni, Jiří Sejkora, Zdeněk Dolníček
A new occurrence of austinite, CaZnAsO4(OH), conichalcite, CaCuAsO4(OH), and zincolivenite, CuZnAsO4(OH), is described from the Tripi mine, Peloritani Mountains, Sicily, Italy. These species have been observed in euhedral crystals in vugs of a calcite vein and were characterised using single-crystal X-ray diffraction, electron microprobe analysis and micro-Raman spectroscopy. Austinite and conichalcite
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New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XX. Evseevite, Na2Mg(AsO4)F, the first natural arsenate with an antiperovskite structure Mineral. Mag. (IF 2.7) Pub Date : 2023-06-29 Igor V. Pekov, Natalia V. Zubkova, Atali A. Agakhanov, Marina F. Vigasina, Vasiliy O. Yapaskurt, Sergey N. Britvin, Anna G. Turchkova, Evgeny G. Sidorov, Elena S. Zhitova, Dmitry Yu. Pushcharovsky
The new mineral evseevite was found in the Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. Evseevite is represented by two chemical varieties. The variety close to the end-member Na2Mg(AsO4)F (holotype) is associated with sanidine, hematite, tenorite, aegirine, cassiterite, sylvite, halite, johillerite
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Groundwater–rock interactions in crystalline rocks: evidence from SIMS oxygen isotope data Mineral. Mag. (IF 2.7) Pub Date : 2023-06-29 Bruce W.D. Yardley, Antoni E. Milodowski, Lorraine P. Field, Roy A. Wogelius, Richard Metcalfe, Simon Norris
The diffusive exchange of dissolved material between fluid flowing in a fracture and the enclosing wallrocks (rock matrix diffusion) has been proposed as a mechanism by which radionuclides derived from a radioactive waste repository may be removed from groundwater and incorporated into the geosphere. To test the effectiveness of diffusive exchange in igneous and metamorphic rocks, we have carried out
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The position of vanadium in the crystal structure of zoisite, variety tanzanite: Structural refinement, optical absorption spectroscopy and bond-valence calculations Mineral. Mag. (IF 2.7) Pub Date : 2023-06-29 Peter Bačík, Manfred Wildner, Jan Cempírek, Radek Škoda, Peter Cibula, Tomáš Vaculovič
Vanadium is the dominant trace element and chromophore in tanzanite, the most valued gemmological variety of zoisite. The structure of zoisite–tanzanite was obtained by structural refinement to assess the vanadium location in the zoisite structure. However, the small V content in tanzanite evidenced by electron microprobe and laser ablation inductively coupled plasma mass spectrometry limits the exact
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Napoliite, Pb2OFCl, a new mineral from Vesuvius volcano, and its relationship with dimorphous rumseyite Mineral. Mag. (IF 2.7) Pub Date : 2023-06-14 Anatoly V. Kasatkin, Oleg I. Siidra, Fabrizio Nestola, Igor V. Pekov, Atali A. Agakhanov, Natalia N. Koshlyakova, Nikita V. Chukanov, Evgeny V. Nazarchuk, Simone Molinari, Manuela Rossi
Napoliite, ideally Pb2OFCl, is a new fluoroxychloride mineral found in a specimen from a fumarole formed subsequent to the 1944 eruption of Vesuvius volcano, Naples Province, Italy. It occurs as well-shaped lamellar crystals up to 0.25 × 0.25 × 0.01 mm typically forming clusters up to 0.4 × 0.4 mm on the surface of volcanic scoria in association with anglesite, artroeite, atacamite, calcioaravaipaite
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Fluorbritholite-(Nd), Ca2Nd3(SiO4)3F, a new and key mineral for neodymium sequestration in REE skarns Mineral. Mag. (IF 2.7) Pub Date : 2023-06-08 Dan Holtstam, Patrick Casey, Luca Bindi, Hans-Jürgen Förster, Andreas Karlsson, Oona Appelt
Fluorbritholite-(Nd), ideally Ca2Nd3(SiO4)3F, has been approved by the International Mineralogical Association (IMA2023–001) and constitutes a new member of the britholite group of the apatite supergroup. It occurs in skarn from the Malmkärra iron mine, Norberg, Västmanland (one of the Bastnäs-type deposits in Sweden), associated with calcite, dolomite, magnetite, lizardite, talc, fluorite, baryte
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Bakakinite, Ca2V2O7, a new mineral from fumarolic exhalations of the Tolbachik volcano, Kamchatka, Russia Mineral. Mag. (IF 2.7) Pub Date : 2023-06-07 Igor V. Pekov, Atali A. Agakhanov, Natalia N. Koshlyakova, Natalia V. Zubkova, Vasiliy O. Yapaskurt, Sergey N. Britvin, Marina F. Vigasina, Anna G. Turchkova, Maria A. Nazarova
The new mineral bakakinite, ideally Ca2V2O7, was found in the high-temperature (not lower than 500°C) exhalations of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. It is associated with anhydrite, svabite, pliniusite, schäferite, berzeliite, diopside, hematite, powellite, baryte, fluorapatite
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Vrančiceite, Cu10Hg3S8, a new Cu–Hg sulfide mineral from Vrančice, Czech Republic Mineral. Mag. (IF 2.7) Pub Date : 2023-05-31 Jiří Sejkora, Cristian Biagioni, Pavel Škácha, Daniela Mauro
Vrančiceite is a new mineral species discovered in a sample collected from the old mine dumps of the abandoned Vrančice deposit near Příbram, central Bohemia, Czech Republic. Vrančiceite occurs as rare anhedral grains, up to 100 μm in size, in a calcite gangue, associated with cinnabar, djurleite, galena and hedyphane. Vrančiceite is black, with metallic lustre. Mohs hardness is ca. 2–3, calculated
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Tennantite-(Ni), Cu6(Cu4Ni2)As4S13, from Luobusa ophiolite, Tibet, China: a new Ni member of the tetrahedrite group Mineral. Mag. (IF 2.7) Pub Date : 2023-05-31 Yanjuan Wang, Rujun Chen, Xiangping Gu, Zengqian Hou, Fabrizio Nestola, Zhusen Yang, Guang Fan, Guochen Dong, Lijuan Ye, Kai Qu
The new mineral tennantite-(Ni), Cu6(Cu4Ni2)As4S13, has been discovered from the Luobusa Chromitite, Tibet, southwestern China. Tennantite-(Ni) occurs as anhedral grains ranging from 2 to 20 μm in size. In reflected light microscopy, tennantite-(Ni) is isotropic and appears yellow-greenish grey. Reflectance data for Commission on Ore Mineralogy wavelengths in air for tennantite-(Ni) are: 31.0 (470
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Mineral chemistry and genesis of monazite-(Sm) and monazite-(Nd) from the Blue Beryl Dyke of the Julianna pegmatite system at Piława Górna, Lower Silesia, Poland Mineral. Mag. (IF 2.7) Pub Date : 2023-05-29 Diana Twardak, Adam Pieczka, Jakub Kotowski, Krzysztof Nejbert
Monazites are one of the most interesting groups of accessory mineral components of crystalline rocks due to the information on geochemical evolution of the crystallisation environment coded in their chemical compositions, in addition to comprising one of the most valuable objects for geochronology studies. This paper presents monazite-(Sm) and monazite-(Nd) from the Blue Beryl Dyke of the Julianna
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Monazite-(Gd), a new Gd-dominant mineral of the monazite group from the Zimná Voda REE–U–Au quartz vein, Prakovce, Western Carpathians, Slovakia Mineral. Mag. (IF 2.7) Pub Date : 2023-05-24 Martin Ondrejka, Pavel Uher, Štefan Ferenc, Juraj Majzlan, Kilian Pollok, Tomáš Mikuš, Stanislava Milovská, Alexandra Molnárová, Radek Škoda, Richard Kopáčik, Sergii Kurylo, Peter Bačík
Monazite-(Gd), ideally GdPO4, is a new mineral of the monazite group. It was discovered near Prakovce-Zimná Voda, ~23 km WNW of Košice, Western Carpathians, Slovakia. It forms anhedral domains (≤100 μm, mostly 10–50 μm in size), in close association with monazite-(Sm), Gd-bearing xenotime-(Y), Gd-bearing hingganite-(Y), fluorapatite and uraninite. All these minerals are hosted in a REE–U–Au quartz–muscovite
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Dongchuanite, a new phosphate mineral with a new structure, from Dongchuan copper mine, Yunnan Province, China Mineral. Mag. (IF 2.7) Pub Date : 2023-05-24 Guowu Li, Ningyue Sun, Hongtao Shen, Yuan Xue, Jinhua Hao, Jeffrey de Fourestier
Dongchuanite, ideally Pb4VIZnIVZn2(PO4)2(PO4)2(OH)2, is a new phosphate mineral with a new type of structure. It was found at the Dongchuan copper mine, Yunnan Province, People's Republic of China. Dongchuanite generally occurs as spherical aggregates with microscopic lamellar crystals, characterised by a turquoise–greenish blue colour. It is transparent, with a colourless streak and has a vitreous
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A brief comment on Hawthorne (2023): “On the definition of distinct mineral species: A critique of current IMA-CNMNC procedures” Mineral. Mag. (IF 2.7) Pub Date : 2023-05-24 Ferdinando Bosi, Frédéric Hatert, Marco Pasero, Stuart J. Mills, Ritsuro Miyawaki, Ulf Hålenius
In this communication we present a brief response to Hawthorne (2023) who, in a paper in volume 87, doi.org/10.1180/mgm.2023.8 (this journal), claims evidence for violations of the electroneutrality principle in mineral formulae derived through IMA–CNMNC procedures: i.e. the dominant-constituent rule, the valency-imposed double site-occupancy, the dominant-valency rule, and the site-total-charge approach
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High-temperature behaviour of fedorite, Na2.5(Ca4.5Na2.5)[Si16O38]F2⋅2.8H2O, from the Murun Alkaline Complex, Russia Mineral. Mag. (IF 2.7) Pub Date : 2023-05-11 Maria Lacalamita, Ernesto Mesto, Ekaterina Kaneva, Roman Shendrik, Tatiana Radomskaya, Emanuela Schingaro
The thermal behaviour of fedorite from the Murun massif, Russia, has been investigated by means of electron probe microanalysis (EPMA), differential thermal analysis (DTA), thermogravimetry (TG), in situ high-temperature single-crystal X-ray diffraction (HT-SCXRD), ex situ high-temperature Fourier-transform infrared spectroscopy (HT-FTIR). The empirical chemical formula of the sample of fedorite studied
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Holubite, Ag3Pb6(Sb8Bi3)Σ11S24, from Kutná Hora, Czech Republic, a new member of the andorite branch of the lillianite homologous series Mineral. Mag. (IF 2.7) Pub Date : 2023-05-11 Richard Pažout, Jakub Plášil, Michal Dušek, Jiří Sejkora, Zdeněk Dolníček
A new mineral species, holubite, ideally Ag3Pb6(Sb8Bi3)Σ11S24, has been found at Kutná Hora ore district, Czech Republic. The mineral is associated with other lillianite homologues (gustavite, terrywallaceite, vikingite and treasurite) most frequently as grain aggregates and replacement rims of earlier Ag–Pb–Bi minerals, growing together in aggregates up to 200 × 50 μm. It typically occurs in a close
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Crystallisation of Ca-bearing nepheline in basanites from Kajishiyama, Tsuyama Basin, Southwest Japan Mineral. Mag. (IF 2.7) Pub Date : 2023-05-02 Keiya Yoneoka, Maki Hamada, Shoji Arai
Ca-bearing nepheline found in the Kajishiyama basanite, Tsuyama Basin, southwest Japan, was investigated to clarify its genesis in silica-undersaturated magmas. The basanite contains olivine and augite as phenocrysts and microphenocrysts, with Ca-bearing nepheline, olivine, augite, ulvöspinel, plagioclase, alkali feldspar, apatite and zeolites in the groundmass. Zeolites are more abundant in coarser-grained
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First occurrence of the M2a2b2c polytype of argentopolybasite, [Ag6Sb2S7][Ag10S4]: Structural adjustments in the Cu-free member of the pearceite–polybasite group Mineral. Mag. (IF 2.7) Pub Date : 2023-05-02 Luca Bindi, Frank N. Keutsch, Dan Topa, Uwe Kolitsch, Marta Morana, Kimberly T. Tait
The chemistry and the crystal structure of the recently described mineral argentopolybasite are critically discussed based on the study of two new occurrences of the mineral: Gowganda, Timiskaming District, Ontario, Canada and IXL Mine, Silver Mountain mining district, Alpine County, California. The crystal structure of argentopolybasite can be described as the sequence, along the c axis, of two alternating
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New data on minerals with the GIS framework-type structure: gismondine-Sr from the Bellerberg volcano, Germany, and amicite and Ba-rich gismondine from the Hatrurim Complex, Israel Mineral. Mag. (IF 2.7) Pub Date : 2023-04-21 Katarzyna Skrzyńska, Georgia Cametti, Rafał Juroszek, Christof Schӓfer, Irina Galuskina
Gismondine-Sr, recently discovered in the Hatrurim Complex in Israel, has been recognised in a xenolith sample from the Bellerberg volcano in Germany. The empirical crystal-chemical formula indicates elevated K content: (Sr1.74Ca1.05Ba0.09K1.56Na0.49)Σ4.93[Al7.98Si8.06O32]⋅9.62H2O. Additionally, Ba-rich gismondine and amicite have been found in the low-temperature mineral association of the pyrometamorphic
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Classifying minerals and their related names in a relational database Mineral. Mag. (IF 2.7) Pub Date : 2023-04-20 Liubomyr Gavryliv, Vitalii Ponomar, Marián Putiš
The categorisation of minerals and their related names, such as synonyms, obsolete or historical names, varieties or mixtures, is an asset for designing an interoperable and consistent mineralogical data warehouse. An enormous amount of this data, provided by mindat.org and other resources, was reviewed and analysed during the research. The analysis indicates the existence of several categories of
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Calcioancylite-(La), (La,Ca)2(CO3)2(OH,H2O)2, a new member of the ancylite group from Gejiu nepheline syenite, Yunnan Province, China Mineral. Mag. (IF 2.7) Pub Date : 2023-04-19 Yanjuan Wang, Xiangping Gu, Guochen Dong, Zengqian Hou, Fabrizio Nestola, Zhusen Yang, Guang Fan, Yufei Wang, Kai Qu
Calcioancylite-(La), ideally (La,Ca)2(CO3)2(OH,H2O)2, has been discovered from nepheline syenite of the Gejiu alkaline complex in the Honghe Hani and Yi Autonomous Prefecture, Yunnan Province, China. The mineral occurs as aggregates of subhedral grains, and the size of single crystals varies between 5–20 μm. Calcioancylite-(La) is colourless to pale pinkish grey and has transparent to translucent lustre
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Libbyite, (NH4)2(Na2□)[(UO2)2(SO4)3(H2O)]2⋅7H2O, a new mineral with uranyl–sulfate sheets from the Blue Lizard mine, San Juan County, Utah, USA Mineral. Mag. (IF 2.7) Pub Date : 2023-04-19 Anthony R. Kampf, Travis A. Olds, Jakub Plášil, Barbara P. Nash, Joe Marty
The new mineral libbyite (IMA2022-091), (NH4)2(Na2□)[(UO2)2(SO4)3(H2O)]2⋅7H2O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as tightly intergrown aggregates of light green–yellow equant crystals in a secondary assemblage with bobcookite, coquimbite, halotrichite, metavoltine, rhomboclase, römerite, tamarugite, voltaite and zincorietveldite. The streak is very pale
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Evidence of the anthropogenic origin of the ‘Carmel sapphire’ with enigmatic super-reduced minerals Mineral. Mag. (IF 2.7) Pub Date : 2023-04-19 Evgeny Galuskin, Irina Galuskina
Corundum with inclusions of enigmatic super-reduced minerals was found in mineral separates received as a result of alluvial sediment exploration near Mt Carmel, Israel by the Shefa Yamim Company. This corundum, registered as ‘Carmel sapphireTM’, has been an object of numerous publications by W. Griffin's scientific team, in which they propose a questionable hypothesis of sapphire formation at the
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Mikenewite, the natural analogue of synthetic α-Mn2+(S4+O3)⋅3H2O, a new sulfite mineral from the Ojuela mine, Mapimí, Mexico Mineral. Mag. (IF 2.7) Pub Date : 2023-04-19 Hexiong Yang, Robert A. Jenkins, James A. McGlasson, Ronald B. Gibbs, Robert T. Downs
A new mineral species, mikenewite (IMA2022-102), ideally Mn2+(S4+O3)⋅3H2O, has been discovered from the San Judas Chimney, Ojuela mine, Mapimí, Durango, Mexico. It occurs as spheres of platy crystals. Associated minerals include goethite, cryptomelane, adamite and lotharmeyerite. Mikenewite is yellowish in transmitted light, transparent with a white streak and vitreous lustre. It is brittle and has
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Bystrite, Na7Ca(Al6Si6O24)S52–Cl–: formula redefinition and relationships with other four-layer cancrinite-group minerals Mineral. Mag. (IF 2.7) Pub Date : 2023-04-19 Nikita V. Chukanov, Anatoly N. Sapozhnikov, Ekaterina V. Kaneva, Dmitry A. Varlamov, Marina F. Vigasina
Bystrite is redefined as a four-layer cancrinite-group mineral with the four-layer Losod-type framework and the end-member formula Na7Ca(Al6Si6O24)S52–Cl–. The mineral is known only at the Malo–Bystrinskoe gem lazurite deposit, Baikal Lake area, Siberia, Russia. The associated minerals are calcite, lazurite, sodalite, fluorapatite, phlogopite, diopside, dolomite and plagioclase. Bystrite is brittle
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CNMNC guidelines for the nomenclature of polymorphs and polysomes Mineral. Mag. (IF 2.7) Pub Date : 2023-04-11 Frédéric Hatert, Stuart J. Mills, Marco Pasero, Ritsuro Miyawaki, Ferdinando Bosi
New guidelines for the nomenclature of polymorphs and polysomes have been approved by the the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA–CNMNC). Several cases can be distinguished. (i) Polymorphs with different crystal systems are distinguished by the prefixes cubo- (cubic), hexa- (hexagonal), tetra- (tetragonal), trigo- (trigonal)
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Chrysoberyl and associated beryllium minerals resulting from metamorphic overprinting of the Maršíkov–Schinderhübel III pegmatite, Czech Republic Mineral. Mag. (IF 2.7) Pub Date : 2023-03-30 Olena Rybnikova, Pavel Uher, Milan Novák, Štěpán Chládek, Peter Bačík, Sergii Kurylo, Tomáš Vaculovič
The Maršíkov–Schinderhübel III pegmatite in the Hrubý Jeseník Mountains, Silesian Domain, Czech Republic, is a classic example of chrysoberyl-bearing LCT granitic pegmatite of beryl–columbite subtype. This thin pegmatite dyke, (up to 1 m in thickness in biotite–amphibole gneiss is characterised by symmetrical internal zoning. Tabular and prismatic chrysoberyl crystals (≤3 cm) occur typically in the