Počet záznamů: 1
The system Fe-Nb-S and its geological implications
- 1.0356123 - FZÚ 2011 RIV CA eng J - Článek v odborném periodiku
Drábek, M. - Hybler, Jiří - Rieder, M. - Böhmová, Vlasta
The system Fe-Nb-S and its geological implications.
Canadian Mineralogist. Roč. 48, č. 5 (2010), s. 1059-1068. ISSN 0008-4476. E-ISSN 1499-1276
Grant CEP: GA ČR GA205/08/0122
Výzkumný záměr: CEZ:AV0Z10100521; CEZ:AV0Z30130516
Klíčová slova: phase relations * edgarite * FexNbyS2 solid solution * Nb sulfides * system Fe-Nb-S * crystal-structure refinements
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.289, rok: 2010
Phase relations within the system Fe–Nb–S were studied experimentally by the technique of evacuated silica glass tubes in the temperature interval 400–1000°C. The dominant field in the system is a broad solid-solution FexNbyyS22 (0 < x < 0.5, 1.0 < y < 1.4) that includes the composition of the mineral edgarite. Also, it forms stable assemblages with pyrrhotite and pyrite. The iron sulfides dissolve limited amounts of Nb: pyrrhotite dissolves up to 1.13 at.% Nb, and pyrite, only 0.02 at.% Nb. We refined the crystal structure of five samples of the FexNbyS2 solid solution, and established the relation between the unit-cell volume and Fe/(Fe + Nb). The occurrence of edgarite can be expected in associations with other sulfides crystallizing under extremely low fugacity of oxygen.
Trvalý link: http://hdl.handle.net/11104/0194732
Počet záznamů: 1