Инд. авторы:	Khokhryakov A.F., Palyanov Y.N., Kupriyanov I.N., Nechaev D.V.
Заглавие:	Diamond crystallization in a CO2-rich alkaline carbonate melt with a nitrogen additive
Библ. ссылка:	Khokhryakov A.F., Palyanov Y.N., Kupriyanov I.N., Nechaev D.V. Diamond crystallization in a CO2-rich alkaline carbonate melt with a nitrogen additive // Journal of Crystal Growth. - 2016. - Vol.449. - P.119-128. - ISSN 0022-0248. - EISSN 1873-5002.
Внешние системы:	DOI: 10.1016/j.jcrysgro.2016.06.001; SCOPUS: 2-s2.0-85008410769; WoS: 000380840700020;
Реферат:	eng: Diamond crystallization was experimentally studied in a CO2-bearing alkaline carbonate melt with an increased content of nitrogen at pressure of 6.3 GPa and temperature of 1500 degrees C. The growth rate, morphology, internal structure of overgrown layers, and defect-impurity composition of newly formed diamond were investigated. The type of growth patterns on faces, internal structure, and nitrogen content were found to be controlled by both the crystallographic orientation of the growth surfaces and the structure of the original faces of diamond seed crystals. An overgrown layer has a uniform structure on the {100} plane faces of synthetic diamond and a fibrillar (fibrous) structure on the faceted surfaces of a natural diamond cube. The {111} faces have a polycentric vicinal relief with numerous twin inter growths and micro twin lamellae. The stable form of diamond growth under experimental conditions is a curved-face hexoctahedron with small cube faces. The nitrogen impurity concentration in overgrown layers varies depending on the growth direction and surface type, from 100 to 1100 ppm. (C) 2016 Elsevier B.V. All rights reserved.
Ключевые слова:	Single crystal growth; High pressure and high temperature; Diamond; NATURAL DIAMOND; SYNTHETIC DIAMONDS; INCLUSIONS; HABIT; SYSTEM; FLUID; EARTHS MANTLE; HPHT SYNTHESIS; CRYSTAL-GROWTH; Crystal morphology; POWDER CATALYST; Point defects;
Издано:	2016
Физ. характеристика:	с.119-128