四面体-(Cd)， Cu6(Cu4Cd2)Sb4S13，产自捷克共和国Příbram附近的rad tice:四面体族中Cd的新成员

IF 1.8 3区地球科学 Q2 MINERALOGY

European Journal of Mineralogy Pub Date : 2023-11-01 DOI:10.5194/ejm-35-897-2023

Jiří Sejkora, Cristian Biagioni, Pavel Škácha, Silvia Musetti, Anatoly V. Kasatkin, Fabrizio Nestola

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引用次数: 0

摘要

摘要(Cd)， Cu6(Cu4Cd2)Sb4S13是在捷克Příbram矿床附近的rad tice发现的一种新矿物。它在石英方解石脉石中以黑色金属菱形颗粒的形式存在，大小可达200 μ m，与方铅矿、波锌矿、闪锌矿、黄铁矿、长石、银、闪辉石、四面体-(Zn)、四面体-(Fe)、四面体-(Cu)以及未知的富铅四面体样相伴生。在反射光下，四面体-(Cd)呈各向同性，呈灰色带绿色。四个COM波长在空气中的反射率数据如下(λ (nm): R(%)): 470: 30.8, 546: 31.1, 589: 31.1和650:28.8。电子探针分析(wt % - 13个点的平均值)Cu 34.85, Ag 2.09, Fe 0.18, Zn 0.26, Cd 11.03, Hg 0.75, Pb 0.31, Sb 28.07, S 23.38，共100.92。根据ΣMe = 16个原子/分子式单位，得到四面体-(Cd)的实验式为Cu9.65Ag0.34Cd1.73Zn0.07Hg0.07Fe0.06Pb0.03Sb4.06S12.84。Tennantite-(Cd)是立方的，I4 - 3m，其单元参数a=10.504(3) Å， V=1158.9(9) Å3, Z=2。利用单晶x射线衍射数据，在Fo>4σ(Fo)的257次独特反射和23个精细参数的基础上，对其晶体结构进行了细化，最终得到R1=0.0252。四面体-(Cd)与其他四面体族矿物是同型的。讨论了它的晶体化学性质，并简要回顾了前人发现的富镉四面体族矿物。

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Tetrahedrite-(Cd), Cu₆(Cu₄Cd₂)Sb₄S₁₃, from Radětice near Příbram, Czech Republic: the new Cd member of the tetrahedrite group

Abstract. Tetrahedrite-(Cd), Cu6(Cu4Cd2)Sb4S13, is a new IMA-approved mineral species from Radětice near the Příbram deposit, Czech Republic. It occurs as black metallic anhedral grains, up to 200 µm in size in quartz–calcite gangue, associated with galena, bournonite, sphalerite, pyrite, geocronite, silver, stromeyerite, tetrahedrite-(Zn), tetrahedrite-(Fe), tetrahedrite-(Cu), and an unknown Pb-rich tetrahedrite-like phase. In reflected light, tetrahedrite-(Cd) is isotropic and grey with greenish tints. Reflectance data for the four COM wavelengths in air are as follows (λ (nm) : R (%)): 470 : 30.8, 546 : 31.1, 589 : 31.1 and 650 : 28.8. Electron microprobe analysis gave (in wt % – average of 13 spot analyses) Cu 34.85, Ag 2.09, Fe 0.18, Zn 0.26, Cd 11.03, Hg 0.75, Pb 0.31, Sb 28.07, and S 23.38, with a total of 100.92. On the basis of ΣMe = 16 atoms per formula unit, the empirical formula of tetrahedrite-(Cd) is Cu9.65Ag0.34Cd1.73Zn0.07Hg0.07Fe0.06Pb0.03Sb4.06S12.84. Tennantite-(Cd) is cubic, I4‾3m, with unit-cell parameters a=10.504(3) Å, V=1158.9(9) Å3, and Z=2. Its crystal structure was refined by single-crystal X-ray diffraction data to a final R1=0.0252 on the basis of 257 unique reflections with Fo>4σ(Fo) and 23 refined parameters. Tetrahedrite-(Cd) is isotypic with other tetrahedrite-group minerals. Its crystal chemistry is discussed, and previous findings of Cd-rich tetrahedrite-group minerals are briefly reviewed.

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来源期刊

European Journal of Mineralogy 地学-矿物学

CiteScore

2.80

自引率

9.50%

发文量

审稿时长

6-12 weeks

期刊介绍： EJM was founded to reach a large audience on an international scale and also for achieving closer cooperation of European countries in the publication of scientific results. The founding societies have set themselves the task of publishing a journal of the highest standard open to all scientists performing mineralogical research in the widest sense of the term, all over the world. Contributions will therefore be published primarily in English. EJM publishes original papers, review articles and letters dealing with the mineralogical sciences s.l., primarily mineralogy, petrology, geochemistry, crystallography and ore deposits, but also biomineralogy, environmental, applied and technical mineralogy. Nevertheless, papers in any related field, including cultural heritage, will be considered.