EXPERIMENTAL JUSTIFICATION OF THE INFLUENCE OF S AND Ni ON CRYSTALLIZATION OF LOW-NITROGEN DIAMONDS IN A MELT OF Fe AT HIGH PRESSURE

V. M. Sonin; Сонин В. М.; E. I. Zhimulev; Жимулев Е. И.; A. A. Chepurov; Чепуров А. А.; A. A. Tomilenko; Томиленко А. А.; A. I. Chepurov; Чепуров А. И.; N. P. Pokhilenko; Похиленко Н. П.

doi:10.31857/S2686739722602599

EXPERIMENTAL JUSTIFICATION OF THE INFLUENCE OF S AND Ni ON CRYSTALLIZATION OF LOW-NITROGEN DIAMONDS IN A MELT OF Fe AT HIGH PRESSURE

Авторлар: Sonin V.¹, Zhimulev E.¹, Chepurov A.¹, Tomilenko A.¹, Chepurov A.¹, Pokhilenko N.¹
Мекемелер:
1. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Шығарылым: Том 509, № 1 (2023)
Беттер: 56-61
Бөлім: МИНЕРАЛОГИЯ
URL: https://journals.rcsi.science/2686-7397/article/view/135746
DOI: https://doi.org/10.31857/S2686739722602599
EDN: https://elibrary.ru/THVHNW
ID: 135746

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Аннотация

Based on the analysis of the results on the synthesis and growth of diamonds in metal-sulfide melts at high pressure, the reason for the crystallization of low-nitrogen diamond crystals is substantiated. The introduction of sulfur into the iron melt leads to a decrease in the solubility of nitrogen, which, in turn, leads to a decrease in the content of nitrogen atoms in the melt and the probability of their capture by growing diamond crystals in the form of a structural impurity. The addition of nickel lowers the melting point of the growth system, increases the amount of melt, and, accordingly, promotes the dissociation of molecular nitrogen into individual atoms, which are captured by diamonds during growth as a structural impurity.

Негізгі сөздер

diamond, metal-sulfide melts, high pressures and temperatures, nitrogen

Әдебиет тізімі

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