Инд. авторы:	Hwang S.L., Shen P., Yui T.F., Chu H.T., Logvinova A.M., Sobolev N.V.
Заглавие:	Low-energy phase boundary pairs and preferred crystallographic orientations of olivines in nanometer-size ultrapotassic fluid inclusions of Aykhal diamond
Библ. ссылка:	Hwang S.L., Shen P., Yui T.F., Chu H.T., Logvinova A.M., Sobolev N.V. Low-energy phase boundary pairs and preferred crystallographic orientations of olivines in nanometer-size ultrapotassic fluid inclusions of Aykhal diamond // Lithos. - 2018. - Vol.322. - P.392-404. - ISSN 0024-4937. - EISSN 1872-6143.
Идентиф-ры:	DOI: 10.1016/j.lithos.2018.10.026; SCOPUS: 2-s2.0-85055899764; WoS: 000452817700025;
Реферат:	eng: The healed internal conjugated cleavages at the core of Aykhal octahedral diamond sample AH2 were decorated with {111}(dia)-facetted ultrapotassic fluid/melt inclusion pockets containing nanosized graphite, phlogopite and olivine (Fo(92)) inclusions. These olivines are either rounded in pockets with ample fluid, or facetted by the {111}(dia) mold in the pockets with a fluid film. Transmission electron microscopy revealed two distinct crystallo-graphic characteristics of olivine inclusions: (1) pronounced crystallographic texture of olivines grouped in specific diamond domain, and (2) frequent parallelism or sub-parallelism of specific low-energy faces of the two phases, mainly (010)(oI), {120}(oI), (001)(oI) and {111)(dia), (110)(dia), {100}(dia) in the order of decreasing preference, forming prominent (010)(oI)/(111)(dia), (010),,i/{110)(dia), (001)(oI)/(110)(dia), {120}(oI)/{111}(dia), and {120}(oI)/{110}(dia) low-energy phase boundaries with thin liquid film of 1-2 nm in between. These findings not only testify to the extremely low adhesion energies of olivine-diamond boundary pairs, but also imply that, in the presence of a fluid phase, the interfacial energetics and the energetically favored crystallographic orientations of olivine inclusions in diamond can be controlled simply by the settlement/attachment of low-energy facets of olivine crystals precipitating from the parental fluid upon the low-energy {111}(dia) or {110}(dia )surfaces of diamond. Such interfacial energetics control and the resultant low-energy boundary pairs are characteristically distinct from the common topotaxy or epitaxy between oxide/silicate mineral pairs, but are in a sense like the Van der Waals heteroepitaxy in artificial systems. (C) 2018 Elsevier B.V. All rights reserved.
Ключевые слова:	MICROCRACKS; FILMS; GROWTH; MANTLE; GARNET; SOLID INCLUSIONS; SIBERIAN DIAMONDS; MINERAL INCLUSIONS; DER-WAALS EPITAXY; TEM; Crystallographic orientation relationship; Crystallographic texture; Low-energy phase boundary pairs; Aykhal diamond; Ultrapotassic fluid inclusions; Olivine inclusions; INSIGHTS;
Издано:	2018
Физ. хар-ка:	с.392-404