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New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XIV. Badalovite, NaNaMg(MgFe3+)(AsO4)3, a member of the alluaudite group
Mineralogical Magazine ( IF 2.7 ) Pub Date : 2020-05-22 , DOI: 10.1180/mgm.2020.43
Igor V. Pekov , Natalia N. Koshlyakova , Atali A. Agakhanov , Natalia V. Zubkova , Dmitry I. Belakovskiy , Marina F. Vigasina , Anna G. Turchkova , Evgeny G. Sidorov , Dmitry Yu. Pushcharovsky

The new alluaudite-group mineral badalovite was found in 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 hematite, tenorite, cassiterite, johillerite, nickenichite, calciojohillerite, bradaczekite, metathénardite, aphthitalite, langbeinite, calciolangbeinite, sanidine, fluorophlogopite, fluoborite, tilasite, anhydrite, pseudobrookite, sylvite, halite, lammerite, urusovite, ericlaxmanite, arsmirandite, svabite, krasheninnikovite, euchlorine, wulffite and alumoklyuchevskite. Badalovite forms oblique-angled prismatic crystals up to 1 mm × 1 mm × 5 mm, typically combined in groups or crusts up to several hundred cm2 in area. The mineral is transparent, green, grey, yellow or colourless, with vitreous lustre. It is brittle, the Mohs hardness is 3½. Cleavage was not observed, the fracture is uneven. Dcalc is 4.02 g cm–3. Badalovite is optically biaxial (–), α = 1.753(3), β = 1.757(3), γ = 1.758(3) and 2Vmeas. = 50(10)°. Chemical composition (wt.%, electron-microprobe; holotype) is: Na2O 9.23, K2O 0.19, CaO 2.04, MgO 13.78, MnO 0.31, CuO 0.12, ZnO 0.24, Al2O3 0.06, Fe2O3 12.77, TiO2 0.01, SiO2 0.06, P2O5 0.33, V2O5 0.05, As2O5 61.51, SO3 0.02, total 100.72. The empirical formula based on 12 O apfu is Na1.67Ca0.20K0.02Mg1.92Zn0.02Mn0.02Cu0.01Fe3+0.90Al0.01(As3.01P0.03Si0.01)Σ3.05O12. The simplified formula is Na2Mg2Fe3+(AsO4)3. Badalovite is monoclinic, C2/c, a = 11.9034(3), b = 12.7832(2), c = 6.66340(16) Å, β = 112.523(3)°, V = 936.59(4) Å3 and Z = 4. The strongest reflections of the powder XRD pattern [d,Å(I)(hkl)] are: 6.41(38)(020), 5.505(20)(200), 3.577(23)( $\bar{1}$ 31), 3.523(25)(310), 3.211(46)( $\bar{1}$ 12), 2.911(28)( $\bar{2}$ 22, $\bar{3}$ 12), 2.765(100)(240, 400) and 2.618(26)( $\bar{1}$ 32). The crystal structure was solved from single-crystal XRD data with an R1 of = 2.49%. Badalovite is isostructural with other alluaudite-group minerals. Its simplified crystal chemical formula is A(1)NaA(1)’A(2)A(2)’NaM(1)MgM(2)(Mg0.5Fe3+0.5)2(AsO4)3 (□ – vacancy) and the end-member formula is NaNaMg(MgFe3+)(AsO4)3. The mineral is named in honour of the outstanding mineralogist and geochemist Stepan Tigranovich Badalov (1919–2014).



中文翻译:

来自俄罗斯堪察加半岛Tolbachik火山Arsenatnaya fumarole的新砷酸盐矿物。十四。Badalovite,NaNaMg(MgFe 3+)(ASO 43中,alluaudite组的成员

在俄罗斯堪察加半岛的托尔巴奇克火山大托尔巴奇克裂隙喷发北部突破口的第二个火山口锥体的Arsenatnaya fumarole中,发现了新的变硅铝石族矿物贝达洛石。它与赤铁矿,球铁矿,锡石,黄铁矿,镍镍矿,钙钛铁矿,Bradaczekite,偏锰铁矿,闪锌矿,氟贝金石,氟钙铝石,山idine石,氟金云母,氟硼铁矿,硅铝石,硬石膏,假锰铁矿,亚硅酸盐,磷灰石,硅藻土,硅藻土,硅藻土,硅藻土,硅藻土,硅藻土,硅藻土西维比特,krasheninnikovite,余氯,白钨矿和铝矾土硅钙石。Badalovite形成高达1 mm×1 mm×5 mm的斜角棱晶,通常成组结合或结壳,厚度可达数百cm 2在地区。矿物为透明,绿色,灰色,黄色或无色,具有玻璃光泽。它很脆,莫氏硬度为3½。没有观察到卵裂,断裂不均匀。D calc为4.02 g cm –3。Badalovite是光学双轴(–),α= 1.753(3),β= 1.757(3),γ= 1.758(3)和2V测量值。= 50(10)°。化学成分(重量%,电子-微探针;整型)为:Na 2 O 9.23,K 2 O 0.19,CaO 2.04,MgO 13.78,MnO 0.31,CuO 0.12,ZnO 0.24,Al 2 O 3 0.06,Fe 2 O 3 12.77,TiO 2 0.01,SiO 2 0.06,P 2 O 50.33,V 2 O 5 0.05,As 2 O 5 61.51,SO 3 0.02,总计100.72。基于12 O apfu经验式为Na 1.67的Ca 0.20 ķ 0.02的Mg 1.920.020.020.013+ 0.900.01(如3.01 P 0.03的Si 0.01Σ3.05 Ö 12。简化公式为Na 2 Mg 2 Fe 3+(AsO 43。Badalovite是单斜晶系,C ^ 2 / ç一个= 11.9034(3),b = 12.7832(2),C ^ = 6.66340(16)α,β= 112.523(3)°,V = 936.59(4)3ž = 4.粉末XRD图案[ d,Å(I)(hkl)]的最强反射为:6.41(38)(020),5.505(20)(200),3.577(23)( $ \ bar {1} $ 31),3.523(25)(310),3.211(46)( $ \ bar {1} $ 12),2.911(28)( $ \ bar {2} $ 22, $ \ bar {3} $ 12) ,2.765(100)(240、400)和2.618(26)( $ \ bar {1} $ 32)。由单晶XRD数据解析晶体结构,R 1 = 2.49%。Badalovite与其他Alluaudite组矿物具有同构结构。其简化的晶体化学式为A(1) Na A(1)'A(2)A(2)' Na M(1) Mg M(2)(Mg 0.5 Fe 3+ 0.52(AsO 43(□–空位),最终成员公式为NaNaMg(MgFe 3+)(AsO 43。该矿物以杰出的矿物学家和地球化学家Stepan Tigranovich Badalov(1919年至2014年)的名字命名。

更新日期:2020-05-22
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