Инд. авторы:	Khokhryakov A.F., Nechaev D.V., Sokol A.G.
Заглавие:	Microrelief of rounded diamond crystals as an indicator of the redox conditions of their resorption in a kimberlite melt
Библ. ссылка:	Khokhryakov A.F., Nechaev D.V., Sokol A.G. Microrelief of rounded diamond crystals as an indicator of the redox conditions of their resorption in a kimberlite melt // Crystals. - 2020. - Vol.10. - Iss. 3. - Art.233. - ISSN 2073-4352.
Внешние системы:	DOI: 10.3390/cryst10030233; РИНЦ: 43271251; SCOPUS: 2-s2.0-85083214546; WoS: 000523512100028;
Реферат:	eng: We conducted a detailed study of the morphology of diamond crystals partially dissolved in a water-bearing kimberlite melt at pressure of 6.3 GPa, temperature of 1400◦C, and two oxygen fugacities (fO2) corresponding to the Re-ReO2 buffer and near the magnetite–hematite (MH) buffer. The triangular etch pits on the {111} faces, which formed during experimental diamond dissolution, were found to completely correspond to negative trigons on natural diamond crystals in the shape and sidewalls inclination angle. Furthermore, two experimental fO2 values were associated with two relief types of the rounded tetrahexahedroid surfaces typical of natural rounded diamonds. Therefore, the surface microrelief on rounded natural diamond crystals was concluded to be an indicator of the redox conditions of natural diamond resorption. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Ключевые слова:	Kimberlite melt; High-temperature; High-pressure; Diamond; Crystal morphology; Resorption;
Издано:	2020
Физ. характеристика:	233