Инд. авторы:	Zhimulev E.I, Sonin V.M., Chepurov A.I., Tomilenko A.A.
Заглавие:	Chromatographic study of formation conditions of rhombododecahedral diamond crystals
Библ. ссылка:	Zhimulev E.I, Sonin V.M., Chepurov A.I., Tomilenko A.A. Chromatographic study of formation conditions of rhombododecahedral diamond crystals // Geology of Ore Deposits. - 2009. - Vol.51. - Iss. 3. - P.243-246. - ISSN 1075-7015. - EISSN 1555-6476.
Внешние системы:	DOI: 10.1134/S1075701509030064; SCOPUS: 2-s2.0-67651091977;
Реферат:	eng: The results of chromatographic study of the formation of rhombododecahedral diamonds synthesized in the Fe-Ni-(Ti)-C system at 5.5-6.0 GPa and 1350-1450°C are presented, including crystals with rounded surfaces of the rhombododecahedron with parallel striation, which are morphological analogues of natural diamonds abundant at various kimberlite, lamproite, and placer deposits. Chromatography was performed at 150°C with mechanical breakup of diamonds. The stable release of methane when diamonds of habit {110} are crushed is established. It is concluded that the appearance of the habit rhombododecahedron may be related not only to the effect of temperature and pressure on crystal growth but also to reductive conditions of crystallization. At the same time, the appearance of significant amounts of hydrocarbons in the system probably results in stopping of the growth of faces {110} and {100} and, instead, formation of specific surfaces that are composed of microscopic accessories faced by planes {111}. © Pleiades Publishing, Ltd. 2009.
Ключевые слова:	hydrocarbon; diamond; crystallization; crystal structure; chromatography; Diamond deposits; Thermal effects; Pressure effects; Placers; Methane; methane; Grain boundaries; Diamonds; Crystallization; Chromatographic analysis; Specific surface; Natural diamonds; Formation condition; Effect of temperature; Diamond crystals; C-systems; Metallic glass;
Издано:	2009
Физ. характеристика:	с.243-246