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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rashchenko, Sergey V., Likhacheva A. Y., Goryainov S. V., Krylov A. S., Litasov, Konstantin D.
Заглавие : In situ spectroscopic study of water intercalation into talc: New features of 10 Å phase formation
Коллективы : Russian Foundation for Basic Research [13-05-00185, 14-05-00616]; Russian Ministry of Education and Science [14.B25.31.0032]; Russian Science Foundation [14-13-00834]
Место публикации : Am. Miner. - 2016. - Vol. 100, Is. 1-2. - P.431-436. - ISSN 0003-004X, DOI 10.2138/am-2016-5356. - ISSN 1945-3027(eISSN)
Примечания : Cited References:32. - This research was supported by Russian Foundation for Basic Research [grants 13-05-00185 and 14-05-00616]. A partial support from Russian Ministry of Education and Science [grant 14.B25.31.0032] and Russian Science Foundation [grant 14-13-00834] is acknowledged. We also acknowledge Mark D. Welch and an anonymous reviewer for a helpful revision of the manuscript.
Предметные рубрики: SYSTEM MgO-SiO2-H2O
SUBDUCTION ZONES
10-ANGSTROM PHASE
HIGH-PRESSURES
H2O CONTENT
HP-HT
MANTLE
STABILITY
TEMPERATURES
GPA
Ключевые слова (''Своб.индексиров.''): 10 angstrom phase--talc--water transport--subduction
Аннотация: The synthesis of 10 angstrom phase via the reaction of talc plus water at 8 GPa and 500 degrees C was studied by in situ Raman spectroscopy using a diamond-anvil cell. The initial fast (2 h) incorporation of interlayer H2O molecules into the talc structure is traced by gradual growth of new OH stretching bands at 3592 and 3621 cm(-1) and the shift of several framework bands. Further monitoring at HP-HT conditions over 7 h reveals gradual weakening of the 3592 cm(-1) band, which can probably be related to the onset of the formation of "long-run" 10 angstrom phase through the appearance of silanol groups following the model proposed by Pawley et al. (2010), influencing the interlayer hydrogen bonding.
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