Инд. авторы:	Belyanchikov M.A., Abramov P.A., Gorshunov B.P., Ragozin A.L., Fursenko D.A., Thomas V.G.
Заглавие:	Distribution of d2o molecules of first and second types in hydrothermally grown beryl crystals
Библ. ссылка:	Belyanchikov M.A., Abramov P.A., Gorshunov B.P., Ragozin A.L., Fursenko D.A., Thomas V.G. Distribution of d2o molecules of first and second types in hydrothermally grown beryl crystals // Crystal Growth & Design. - 2021. - Vol.21. - Iss. 4. - P.2283-2291. - ISSN 1528-7483. - EISSN 1528-7505.
Внешние системы:	DOI: 10.1021/acs.cgd.0c01702; РИНЦ: 46763758;
Реферат:	eng: This article reports on the uneven distribution of water molecules of first (D2O-I) and second (D2O-II) types in a D2O-containing beryl crystal grown hydrothermally on a non-singularly oriented flat seed {5.5.10¯.6}, as identified by infrared spectroscopic studies of crystal fragments. The distribution of D2O-II molecules is very heterogeneous, and their maximal concentrations are at the boundaries of the growth sectors of micro-faces, which protrude from the surface growth front {5.5.10¯.6}. We attribute this increase in the D2O-II content to the tensions and the resulting increased internal pressure at the boundaries of the growth sectors of micro-faces. Specifically, the increased internal pressure shifts the isomorphic substitution equation in beryl SiT14+ → AlT13+ + LiR″+ to the right (T1 and R″ denote the crystal's chemical positions of cations), which triggers the D2O-I → D2O-II transformation. The number of growth sector boundaries goes down as the growth front moves, reducing the number of areas with increased internal pressure and the proportion of D2O-II/D2O-I.
Издано:	2021
Физ. характеристика:	с.2283-2291
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