Инд. авторы:	Likhacheva A.Y., Rashchenko S.V.
Заглавие:	FORMATION OF THE HIGH-PRESSURE MODIFICATION OF HYDRATED TALC AT 450 degrees C AND 4 GPa: IN SITU DIFFRACTION STUDY
Библ. ссылка:	Likhacheva A.Y., Rashchenko S.V. FORMATION OF THE HIGH-PRESSURE MODIFICATION OF HYDRATED TALC AT 450 degrees C AND 4 GPa: IN SITU DIFFRACTION STUDY // Journal of Structural Chemistry. - 2016. - Vol.57. - Iss. 7. - P.1392-1397. - ISSN 0022-4766. - EISSN 1573-8779.
Внешние системы:	DOI: 10.1134/S0022476616070131; SCOPUS: 2-s2.0-85009959435; WoS: 000392616400013;
Реферат:	eng: The formation of the high-pressure hydrous phase Mg3Si O-4(10)(OH)(2)center dot xH(2)O(10 angstrom phase) through the reaction "talc + water" at 450 degrees C and 4 GPa was studied using diamond anvil cell. The powder diffraction measurements in situ, performed at the Siberian Center of Synchrotron and Terahertz Radiation (SSTRC), were applied to refine the lattice parameters, atomic coordinates and the occupancy of interlayer H2O site in the structure of 10 angstrom phase at 450 degrees C and 4 GPa. The lattice parameters are a = 5.234(1) angstrom, b = 9.053(2) angstrom, c = 10.87(1) angstrom, beta = 99.2(1)degrees, and V = 508.5(6) angstrom(3) (space group C2/m). The results of Rietveld refinement show the best fit for the trioctahedral mica structure with split position Ow of the interlayer H2O molecule. The half occupancy of the Ow site corresponds to one H2O molecule per formula unit.
Ключевые слова:	high temperature; high pressure; powder diffraction in situ; synchrotron radiation; 10 ANGSTROM PHASE; SYSTEM MGO-SIO2-H2O; talc; H2O CONTENT; TEMPERATURES; SUBDUCTION; LITHOSPHERE; STABILITY; 10-ANGSTROM PHASE; 10 angstrom phase;
Издано:	2016
Физ. характеристика:	с.1392-1397