Tellurium-rich stibiogoldfieldite and Se-bearing dantopaite from Goldfield, Nevada, USA: new crystal chemical data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F24%3A10136553" target="_blank" >RIV/00023272:_____/24:10136553 - isvavai.cz</a>

Result on the web

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/telluriumrich-stibiogoldfieldite-and-sebearing-dantopaite-from-goldfield-nevada-usa-new-crystal-chemical-data/76568FB6DF95F831239F6B13A5BE1DC4" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/telluriumrich-stibiogoldfieldite-and-sebearing-dantopaite-from-goldfield-nevada-usa-new-crystal-chemical-data/76568FB6DF95F831239F6B13A5BE1DC4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2023.77" target="_blank" >10.1180/mgm.2023.77</a>

Result language

angličtina

Original language name

Tellurium-rich stibiogoldfieldite and Se-bearing dantopaite from Goldfield, Nevada, USA: new crystal chemical data

Original language description

Cotype material of stibiogoldfieldite from the Mohawk mine, Goldfield, Nevada, USA, has been examined in order to collect single-crystal X-ray diffraction data of Te-rich stibiogoldfieldite and to characterise the associated Ag-Bi-(S,Se) phase. Tellurium-rich stibiogoldfieldite, with empirical formula (Cu11.30Ag0.03)sigma(11.33)(Sb0.80As0.57Bi0.06Te2.57)sigma(4.00)(S12.83Se0.20)sigma(13.03), is cubic, space group I43m, with unit-cell parameters a = 10.2947(3) angstrom and V = 1091.04(10) angstrom(3). Its crystal structure has been refined to R1 = 0.0161 for 397 unique reflections with Fo &gt; 4 sigma(Fo) and 25 refined parameters. The structure refinement confirmed the occurrence of a vacancy at the M(2) site, in agreement with the substitution Cu-M(2)+ + (X(3))(Sb/As)(3+) = (M(2)) + Te-X(3)(4+). The Ag-Bi-(S,Se) phase was identified as the P-6 homologue of the pavonite series, namely dantopaite. Its empirical formula is Cu1.36Ag4.39Pb0.12Bi12.62Sb0.06(S14.01Se7.91Te0.08), showing an exceptionally high Se content. Unit-cell parameters of Se-bearing dantopaite are a = 13.518(2), b = 4.0898(6), c = 18.984(3) angstrom , beta = 106.816(6)(degrees), V = 1004.7(3) angstrom(3) and space group C2/m. The crystal structure was refined to R-1 = 0.0504 for 1230 unique reflections with F-o &gt; 4 sigma(F-o) and 82 refined parameters. The metal excess (similar to 0.55 atoms per formula unit) of this pavonite homologue is mainly due to the accumulation of Ag and Cu in the thin slab of the crystal structure, whereas the high Se content is related to the partial replacement of S occurring preferentially in the thick PbS-like slab. Domains richer in Se and Pb in dantopaite, with empirical formula Cu0.89Ag4.50Pb0.49Bi12.53Sb0.07(S11.26Se10.74), were also identified, as grains up to 30 microns in size intimately intergrown with bohdanowiczite, indicating the possibility of a wide Se-to-S substitution in dantopaite.

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

2024

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

88

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

40-48

UT code for WoS article

001146581500001

EID of the result in the Scopus database

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