Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Конференция: 10th International Congress for Applied Mineralogy (ICAM); Trondheim; Trondheim
Год издания: 2012
Ключевые слова: cation vacancies, rock, the calculation of the concentration of point defects, crystal structure, nonstoichiometric minerals
Аннотация: On the basis of comprehensive analysis of the crystal structure and chemical and phase composition of natural pyrrhotites of the "Blagodatny" mine (Krasnoyarsk region), an analytical expression for calculating the concentration of point defects in nonstoichiometric minerals is obtained. Calculation of concentration of point defectsПоказать полностьюin the crystal structure of natural pyrrhotites of various chemical compounds is made and compared with the gold content in samples. Concentration of point defects is calculated separately for the inclusion of defects (Co, Ni, Cu, Zn, Sb, etc.), and cation vacancies in the crystal structure. As a result of theoretical calculations and the analysis of X-ray spectra and the chemical composition, the dependence of the concentration of point defects and their ordering in the crystal structure on the gold content in the rock is established. The maximum content of gold corresponds to pyrrhotites in which vacancies are completely ordered in even (odd) basic planes of structure of type NiAs. The chemical formula for content representation of the nonstoichiometric minerals containing atoms in crystal structure, distinct from atoms of a forming matrix, is offered.
Журнал: Proceedings of the 10th International Congress for Applied Mineralogy (ICAM)
Номера страниц: 487-494
Издатель: Springer, Berlin, Heidelberg