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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

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

2024

Kód důvěrnosti údajů

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

Název periodika

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

—

Svazek periodika

88

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

40-48

Kód UT WoS článku

001146581500001

EID výsledku v databázi Scopus

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