The new mineral bianchiniite, Ba2(Ti4+V3+)(As2O5)2OF, has been discovered in the Monte Arsiccio mine, Apuan Alps, Tuscany, Italy. It occurs as brown {001} tabular crystals, up to 1 mm across, with a vitreous lustre. It is brittle, with a perfect {001} cleavage. Streak is brownish. In reflected light, bianchiniite is grey, with orange–yellow internal reflections. It is weakly bireflectant, with a very weak anisotropy in shades of grey. Minimum and maximum reflectance data for COM wavelengths [Rmin/Rmax (%), (λ, nm)] are: 5.0/5.8 (470), 5.7/6.5 (546), 5.7/7.0 (589) and 5.2/6.3 (650). Electron microprobe analyses gave (wt.% – average of 10 spot analyses): TiO2 10.34, V2O3 3.77, Fe2O3 3.76, As2O3 44.36, Sb2O3 0.22, SrO 0.45, BaO 34.79, PbO 0.28, F 1.77, sum 99.74, –O = F –0.75, total 98.99. On the basis of 12 anions per formula unit, the empirical formula of bianchiniite is (Ba2.00Sr0.04Pb0.02)Σ2.06(Ti4+1.14V3+0.44Fe3+0.42)Σ2.00[(As3.96Sb0.02)Σ3.98O10](O1.18F0.82)Σ2.00. Bianchiniite is tetragonal, space group I4/mcm, with unit-cell parameters a = 8.7266(4), c = 15.6777(7) Å, V = 1193.91(12) Å3 and Z = 8. Its crystal structure was refined from single-crystal X-ray diffraction data to R1 = 0.0134 on the basis of 555 unique reflections with Fo > 4σ(Fo) and 34 refined parameters. The crystal structure shows columns of corner-sharing [Ti/(V,Fe)]-centred octahedra running along c, connected along a and b through (As2O5) dimers. A {001} layer of Ba-centred [10+2]-coordinated polyhedra is intercalated between (As2O5) dimers. Bianchiniite has structural relations with fresnoite- and melilite-group minerals. The name honours the two mineral collectors Andrea Bianchini (b. 1959) and Mario Bianchini (b. 1962) for their contribution to the knowledge of the mineralogy of pyrite ± baryte ± iron-oxide ore deposits from the Apuan Alps.

在意大利托斯卡纳的阿普安阿尔卑斯山的 Monte Arsiccio 矿中发现了新的矿物边纹岩 Ba 2 (Ti 4+ V 3+ )(As 2 O 5 ) 2 OF。它以棕色 {001} 板状晶体形式出现，直径可达 1 毫米，具有玻璃光泽。它很脆，具有完美的 {001} 解理。条痕呈褐色。在反射光下，边纹石呈灰色，内部反射呈橙黄色。它具有弱双反射性，在灰色阴影中具有非常弱的各向异性。COM 波长的最小和最大反射率数据 [ R min / R max(%), (λ, nm)] 为：5.0/5.8 (470)、5.7/6.5 (546)、5.7/7.0 (589) 和 5.2/6.3 (650)。电子微探针分析给出（重量百分比 - 10 次点分析的平均值）：TiO 2 10.34、V 2 O 3 3.77、Fe 2 O 3 3.76、As 2 O 3 44.36、Sb 2 O 3 0.22、SrO 0.45、BaO 3 PbO 0.28，F 1.77，总和 99.74，–O = F –0.75，总和 98.99。以每分子式单位12个阴离子为基础，边蛇纹石的经验式为(Ba 2.00 Sr 0.04 Pb 0.02 ) Σ2.06 (Ti 4+ 1.14 V 3+ 0.44 Fe3+ 0.42 ) Σ2.00 [(As 3.96 Sb 0.02 ) Σ3.98 O 10 ](O 1.18 F 0.82 ) Σ2.00。Bianchiniite 为四方晶系，空间群I 4/ mcm，晶胞参数a = 8.7266(4), c = 15.6777(7) Å, V = 1193.91(12) Å 3和Z = 8。其晶体结构由单晶 X 射线衍射数据R 1 = 0.0134 基于 555 次F o > 4σ( Fo ) 和 34 个精炼参数。晶体结构显示了沿c运行的共角 [Ti/(V,Fe)] 中心八面体列，通过 (As 2 O 5 ) 二聚体沿a和b连接。以 Ba 为中心的 [10+2] 配位多面体的 {001} 层插入 (As 2 O 5 ) 二聚体之间。Bianchiniite与fresnoite-和melilite-group矿物有结构关系。这个名字是为了纪念两位矿物收藏家 Andrea Bianchini（生于 1959 年）和 Mario Bianchini（生于 1962 年）对来自阿普安阿尔卑斯山的黄铁矿 ± 重晶石 ± 氧化铁矿床的矿物学知识的贡献。