Stibiogoldfieldite, Cu12(Sb2Te2)S13, a new tetrahedrite-group mineral

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F22%3A10135667" target="_blank" >RIV/00023272:_____/22:10135667 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/stibiogoldfieldite-cu12sb2te2s13-a-new-tetrahedritegroup-mineral/8F4A40ED811B95B9CAD88ADB6B7D24D4" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/stibiogoldfieldite-cu12sb2te2s13-a-new-tetrahedritegroup-mineral/8F4A40ED811B95B9CAD88ADB6B7D24D4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2021.107" target="_blank" >10.1180/mgm.2021.107</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stibiogoldfieldite, Cu12(Sb2Te2)S13, a new tetrahedrite-group mineral

Popis výsledku v původním jazyce

Stibiogoldfieldite, Cu12(Sb2Te2)S13, was approved as a new mineral species from the Mohawk mine, Goldfield mining district, Esmeralda County, Nevada, USA. It occurs as metallic anhedral grains, dark grey in colour. It is associated with quartz, pyrite and an Ag-Bi-(S,Se) phase (holotype material) and with quartz, pyrite, calaverite, bismuthinite, bohdanowiczite, and the Ag-Bi-(S,Se) phase (cotype material). In reflected light, stibiogoldfieldite is isotropic, grey in colour, with indistinct brownish shade. Reflectance data in air [R (%)] are: 31.1 at 470 nm, 30.9 at 546 nm, 30.8 at 589 nm and 31.0 at 650 nm. Electron microprobe analysis for holotype material gave (in wt.% - average of 60 spot analyses): Cu 45.03(60), Ag 0.26(7), Fe 0.02(3), Zn 0.13(15), Sn 0.02(4), Pb 0.05(6), Sb 8.02(62), As 2.80(65), Bi 2.77(87), Te 15.15(1.24), S 24.50(32), Se 0.52(11), total 99.27(69). On the basis of (As + Sb + Te + Bi) = 4 apfu, the empirical formula of stibiogoldfieldite is (Cu12.05Ag0.04Zn0.03Fe0.01)12.13(Sb1.12As0.63Bi0.23Te2.02)4.00(S12.99Se0.11)13.10. Chemical data on an additional sample from the same locality (cotype material) gave the following results (in wt.% - average of 181 spot analyses): Cu 43.84(63), Ag 0.21(7), Sb 5.92(78), As 2.63(45), Te 20.07(1.19), S 25.13(53), Se 0.97(35), total 99.47(66). On the basis of (As + Sb + Te + Bi) = 4 apfu, the empirical formula of cotype material is (Cu11.30Ag0.03) 11.33(Sb0.80As0.57Bi0.06Te2.57)4.00(S12.83Se0.20)13.03. Stibiogoldfieldite is cubic, I 4-3m, with unit-cell parameters a = 10.3466(17) A, V = 1107.6(5) A3 and Z = 2 (holotype). Unit-cell parameters for the cotype sample are a = 10.3035(2) A and V = 1093.83(7) A3. The crystal structure of holotype stibiogoldfieldite was refined by single-crystal X-ray diffraction data to a final R1 = 0.032 on the basis of 285 reflections with Fo &gt; 4 sigma(Fo) and 20 refined parameters. Stibiogoldfieldite is isotypic with other members of the tetrahedrite group.

Název v anglickém jazyce

Stibiogoldfieldite, Cu12(Sb2Te2)S13, a new tetrahedrite-group mineral

Popis výsledku anglicky

Stibiogoldfieldite, Cu12(Sb2Te2)S13, was approved as a new mineral species from the Mohawk mine, Goldfield mining district, Esmeralda County, Nevada, USA. It occurs as metallic anhedral grains, dark grey in colour. It is associated with quartz, pyrite and an Ag-Bi-(S,Se) phase (holotype material) and with quartz, pyrite, calaverite, bismuthinite, bohdanowiczite, and the Ag-Bi-(S,Se) phase (cotype material). In reflected light, stibiogoldfieldite is isotropic, grey in colour, with indistinct brownish shade. Reflectance data in air [R (%)] are: 31.1 at 470 nm, 30.9 at 546 nm, 30.8 at 589 nm and 31.0 at 650 nm. Electron microprobe analysis for holotype material gave (in wt.% - average of 60 spot analyses): Cu 45.03(60), Ag 0.26(7), Fe 0.02(3), Zn 0.13(15), Sn 0.02(4), Pb 0.05(6), Sb 8.02(62), As 2.80(65), Bi 2.77(87), Te 15.15(1.24), S 24.50(32), Se 0.52(11), total 99.27(69). On the basis of (As + Sb + Te + Bi) = 4 apfu, the empirical formula of stibiogoldfieldite is (Cu12.05Ag0.04Zn0.03Fe0.01)12.13(Sb1.12As0.63Bi0.23Te2.02)4.00(S12.99Se0.11)13.10. Chemical data on an additional sample from the same locality (cotype material) gave the following results (in wt.% - average of 181 spot analyses): Cu 43.84(63), Ag 0.21(7), Sb 5.92(78), As 2.63(45), Te 20.07(1.19), S 25.13(53), Se 0.97(35), total 99.47(66). On the basis of (As + Sb + Te + Bi) = 4 apfu, the empirical formula of cotype material is (Cu11.30Ag0.03) 11.33(Sb0.80As0.57Bi0.06Te2.57)4.00(S12.83Se0.20)13.03. Stibiogoldfieldite is cubic, I 4-3m, with unit-cell parameters a = 10.3466(17) A, V = 1107.6(5) A3 and Z = 2 (holotype). Unit-cell parameters for the cotype sample are a = 10.3035(2) A and V = 1093.83(7) A3. The crystal structure of holotype stibiogoldfieldite was refined by single-crystal X-ray diffraction data to a final R1 = 0.032 on the basis of 285 reflections with Fo &gt; 4 sigma(Fo) and 20 refined parameters. Stibiogoldfieldite is isotypic with other members of the tetrahedrite group.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

—

Svazek periodika

86

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

168-175

Kód UT WoS článku

000759699900001

EID výsledku v databázi Scopus

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