Tennantite-(Hg), Cu6(Cu4Hg2)As4S13, a new tetrahedrite-group mineral from the Lengenbach quarry, Binn, Switzerland

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F21%3A10135288" target="_blank" >RIV/00023272:_____/21:10135288 - isvavai.cz</a>

Result on the web

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/tennantitehg-cu6cu4hg2as4s13-a-new-tetrahedritegroup-mineral-from-the-lengenbach-quarry-binn-switzerland/F77CA0988FCFE2D5D628E1A9C9288647" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/tennantitehg-cu6cu4hg2as4s13-a-new-tetrahedritegroup-mineral-from-the-lengenbach-quarry-binn-switzerland/F77CA0988FCFE2D5D628E1A9C9288647</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2021.59" target="_blank" >10.1180/mgm.2021.59</a>

Result language

angličtina

Original language name

Tennantite-(Hg), Cu6(Cu4Hg2)As4S13, a new tetrahedrite-group mineral from the Lengenbach quarry, Binn, Switzerland

Original language description

Tennantite-(Hg), Cu6(Cu4Hg2)As4S13, was approved as a new mineral species from the Lengenbach quarry, Imfeld, Binn Valley, Canton Valais, Switzerland. It was identified as an aggregate of black metallic tetrahedral crystals, less than 0.1 mm in size, intimately associated with sinnerite, and grown on realgar. In reflected light, tennantite-(Hg) is isotropic, grey in color, with creamy tints. Minimum and maximum reflectance data for COM wavelengths in air are [λ (nm): R (%)]: 470: 29.1; 546: 29.1; 589: 28.5; 650: 27.7. Electron microprobe analysis gave (in wt% - average of 7 spot analyses): Cu 32.57(42), Ag 6.38(19), Tl 0.29(14), Zn 0.04(5), Hg 17.94(227), Pb 0.70(51), As 17.83(61), Sb 0.34(8), S 24.10(41), total 100.19(104). The empirical formula of the studied sample, recalculated on the basis of ΣMe = 16 atoms per formula unit, is (Cu4.69Ag1.04Tl0.03)Σ5.76(Cu4.35Hg1.58Pb0.06Zn0.01)Σ6.00 (As4.20Sb0.05)Σ4.25S13.26. Tennantite-(Hg) is cubic, I 3m, with a = 10.455(7) Å, V = 1143(2) Å3, Z = 2. The crystal structure of tennantite-(Hg) has been refined by single-crystal X-ray diffraction data to a final R1 = 0.0897 on the basis of 214 unique reflections with Fo &gt; 4σ(Fo) and 22 refined parameters. Tennantite-(Hg) is isotypic with other members of the tetrahedrite group. Mercury is hosted at the tetrahedrally coordinated M(1) site, in accord with the relatively long M(1)-S(1) distance (2.389 Å), similar to that observed in tetrahedrite-(Hg). Minor Ag is located at the triangularly-coordinated and split M(2) site. Other occurrences of tennantite-(Hg) are briefly reviewed and the Lengenbach finding is described within the framework of previous knowledge about the Hg mineralogy at this locality.

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

2021

Confidentiality

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

Name of the periodical

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

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Volume of the periodical

85

Issue of the periodical within the volume

5

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

744-751

UT code for WoS article

000723015700010

EID of the result in the Scopus database

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