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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10504 - Mineralogy

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Volume of the periodical

70

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

10

Pages from-to

33-42

UT code for WoS article

001606205400001

EID of the result in the Scopus database

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