Arsenogoldfieldite, Cu12(As2Te2)Σ4S13, a new tetrahedrite-group mineral

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F25%3A10136995" target="_blank" >RIV/00023272:_____/25:10136995 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.jgeosci.org/content/jgeosci.0034.25_Sejkora.pdf" target="_blank" >https://www.jgeosci.org/content/jgeosci.0034.25_Sejkora.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.0034.25" target="_blank" >10.3190/jgeosci.0034.25</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Arsenogoldfieldite, Cu12(As2Te2)Σ4S13, a new tetrahedrite-group mineral

Popis výsledku v původním jazyce

Arsenogoldfieldite is a new mineral discovered in a sample collected from the North Star mine, Mammoth, Tintic district, Juab County, Utah, U.S.A (type locality). It occurs as anhedral grains, up to 300 μm in size, in a quartz gangue, associated with tellurium, enargite including Sn-bearing variety and supergene juabite. Arsenogoldfieldite is black, with a metallic luster. Mohs hardness is ca. 31/2-4; calculated density is 4.954 g.cm-3. In reflected light, arsenogoldfieldite is grey with a brownish shade; it is isotropic. Internal reflections were not observed. Reflectance values for the four COM wavelengths in air [R (%) λ (nm)] are: 30.2(470); 29.9(546); 29.9 (589); and 30.4 (650). The empirical formula of arsenogoldfieldite is Cu11.75Zn0.03Fe0.02[(As1.44Sb0.43Bi0.13)Σ2.00Te2.00]S13.11. The ideal formula is Cu12(As2Te2)S13, which requires (in wt. %) Cu 48.13, As 9.46, Te 16.11, S 26.30, total of 100.00. Arsenogoldfieldite is cubic, I-43m, with unit-cell parameters a = 10.2868(4) Å, V = 1088.53(13) Å3, Z = 2. The strongest reflections of the X-ray powder diffraction pattern [d, Å (I) hkl] are: 3.638 (8) 220, 2.969 (100) 222, 2.573 (9) 400, 1.8187(21) 440 and 1.5504(9) 622, According to the single-crystal X-ray diffraction data (R = 0.0221 on the basis of 380 unique reflections with Fo &gt; 4σFo and 22 refined parameters), arsenogoldfieldite is isotypic with other tetrahedrite-group minerals. Arsenogoldfieldite is named in agreement with the nomenclature of the tetrahedrite group as the (As/Te) end-member in the goldfieldite series. The mineral and its name have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (2022-084). The description of arsenogoldfieldite from the Pefka mine, Alexandroupoli, Western Thrace, Greece (cotype locality), its chemical composition and crystal structure data are also given in the paper.

Název v anglickém jazyce

Arsenogoldfieldite, Cu12(As2Te2)Σ4S13, a new tetrahedrite-group mineral

Popis výsledku anglicky

Arsenogoldfieldite is a new mineral discovered in a sample collected from the North Star mine, Mammoth, Tintic district, Juab County, Utah, U.S.A (type locality). It occurs as anhedral grains, up to 300 μm in size, in a quartz gangue, associated with tellurium, enargite including Sn-bearing variety and supergene juabite. Arsenogoldfieldite is black, with a metallic luster. Mohs hardness is ca. 31/2-4; calculated density is 4.954 g.cm-3. In reflected light, arsenogoldfieldite is grey with a brownish shade; it is isotropic. Internal reflections were not observed. Reflectance values for the four COM wavelengths in air [R (%) λ (nm)] are: 30.2(470); 29.9(546); 29.9 (589); and 30.4 (650). The empirical formula of arsenogoldfieldite is Cu11.75Zn0.03Fe0.02[(As1.44Sb0.43Bi0.13)Σ2.00Te2.00]S13.11. The ideal formula is Cu12(As2Te2)S13, which requires (in wt. %) Cu 48.13, As 9.46, Te 16.11, S 26.30, total of 100.00. Arsenogoldfieldite is cubic, I-43m, with unit-cell parameters a = 10.2868(4) Å, V = 1088.53(13) Å3, Z = 2. The strongest reflections of the X-ray powder diffraction pattern [d, Å (I) hkl] are: 3.638 (8) 220, 2.969 (100) 222, 2.573 (9) 400, 1.8187(21) 440 and 1.5504(9) 622, According to the single-crystal X-ray diffraction data (R = 0.0221 on the basis of 380 unique reflections with Fo &gt; 4σFo and 22 refined parameters), arsenogoldfieldite is isotypic with other tetrahedrite-group minerals. Arsenogoldfieldite is named in agreement with the nomenclature of the tetrahedrite group as the (As/Te) end-member in the goldfieldite series. The mineral and its name have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (2022-084). The description of arsenogoldfieldite from the Pefka mine, Alexandroupoli, Western Thrace, Greece (cotype locality), its chemical composition and crystal structure data are also given in the paper.

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

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Geosciences

ISSN

1802-6222

e-ISSN

—

Svazek periodika

70

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

33-42

Kód UT WoS článku

001606205400001

EID výsledku v databázi Scopus

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