Auerbakhite, MnTl2As2S5, a new thallium sulfosalt from the Vorontsovskoe gold deposit, Northern Urals, Russia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00124456" target="_blank" >RIV/00216224:14310/21:00124456 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/21:00560604

Result on the web

<a href="http://www.jgeosci.org/detail/jgeosci.321" target="_blank" >http://www.jgeosci.org/detail/jgeosci.321</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.321" target="_blank" >10.3190/jgeosci.321</a>

Result language

angličtina

Original language name

Auerbakhite, MnTl2As2S5, a new thallium sulfosalt from the Vorontsovskoe gold deposit, Northern Urals, Russia

Original language description

Auerbakhite (IMA 2020-047), MnTl2As2S5, is a new sulfosalt from the Vorontsovskoe gold deposit, Sverdlovsk Oblast', Northern Urals, Russia. The new mineral occurs in limestone breccias composed of calcite, dolomite, baryte, clinochlore, fluorapatite and quartz, and cemented by major realgar, orpiment and pyrite. Other minerals directly associating with auerbakhite include alabandite, bernardite, christite, cinnabar, coloradoite, dalnegroite, gillulyite, gold, hutchinsonite, imhofite, lorandite, metacinnabar, philrothite, rebulite, routhierite, sphalerite, and vrbaite. Auerbakhite forms rare and very small short-prismatic crystals and irregular grains which do not exceed 15 x 5 mu m. It is transparent, has a bright red color and adamantine luster. Auerbakhite is brittle, with an uneven fracture. Cleavage is not observed. The calculated density is 5.245 g/cm(3). In reflected light, auerbakhite is light gray, weakly bireflectant. In crossed polars, it is distinctly anisotropic, in light gray and brown tones, with abundant bright red internal reflections. The empirical formula of auerbakhite is Mn1.04Tl1.97Pb0.02As1.95S5.02 (based on 10 atoms pfu). Prominent features in the Raman spectrum include bands of Mn-S and As-S stretching vibrations and numerous low-frequency bands related to mixed soft modes involving bending and Tl-S stretching vibrations. Auerbakhite is orthorhombic, space group Cmce, a = 15.3280(15) angstrom, b = 7.662(7)angstrom, c = 16.6330(14)angstrom, V = 1953.40(18)angstrom(3) and Z = 8. The crystal structure of auerbakhite was refined from the single-crystal X-ray diffraction data to R = 0.0723 for 307 observed reflections with I-obs &gt; 3 sigma(I). Auerbakhite is isostructural to the synthetic phase Tl2MnAs2S5. Its crystal structure consists of complex (001) layers based on a set of MnS4 columns parallel to [010] and are composed of edge-sharing slightly irregular MnS6 octahedra. The columns are connected via Tl1 and are framed by paired AsS3 pyramids with lone electron pairs oriented into interlayer space. Highly irregular Tl(2)S-6 coordination polyhedra are situated in interlayers and share ligands with the layers. The new mineral honors Russian mining engineer, manufacturer and mineralogist Alexander Andreevitch Auerbakh whose activities were closely related to Northern Urals.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10504 - Mineralogy

Project

—

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

Journal of Geosciences

ISSN

1802-6222

e-ISSN

1803-1943

Volume of the periodical

66

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

89-96

UT code for WoS article

000677614600002

EID of the result in the Scopus database

2-s2.0-85105951614