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    Raman study of datolite CaBSiO4(OH) at simultaneously high pressure and high temperature / S. V. Goryainov [et al.] // J. Raman Spectrosc. - 2015. - Vol. 46, Is. 1. - P. 177-181, DOI 10.1002/jrs.4614. - Cited References:30. - This work was partly supported by the Russian Foundation for BasicResearch (grants N 14-05-00616 and 13-05-00185) and the Ministry ofEducation and Science of the Russian Federation. . - ISSN 0377. - ISSN 1097-4555
   Перевод заглавия: Исследование датолита CaBSiO4(ОН) при одновременно высоком давлении и высокой температуре методом спектроскопии комбинационного света

РУБ Spectroscopy
Рубрики:
X-RAY-DIFFRACTION
   CRYSTAL-STRUCTURE
   HYDROGEN-BOND
   SPECTROSCOPY
Кл.слова (ненормированные):
Raman spectra -- datolite -- high pressure -- high temperature -- diamond anvil -- cell
Аннотация: Using an in situ method of Raman spectroscopy and resistance-heated diamond anvil cell, the system datolite CaBSiO4(OH) – water has been investigated at simultaneously high pressure and temperature (up to Р ~5 GPa and Т ~250 °С). Two polymorphic transitions have been observed: (1) pressure-induced phase transition or the feature in pressure dependence of Raman band wavenumbers at P = 2 GPа and constant T = 22 °С and (2) heating-induced phase transition at T ~90 °С and P ~5 GPа. The number of Raman bands is retained at the first transition but changed at the second transition. The first transition is mainly distinguished by the changes in the slopes of pressure dependence of Raman peaks at 2 GPa. The second transition is characterized by several strong changes: the wavenumber jumps of major bands, the merging of strong doublets at 378 and 391 cm−1 (values for ambient conditions), the splitting of the intermediate-intensity band at 292 cm−1, and the transformation of some low-wavenumber bands at 160–190 cm−1. No spectral and visual signs of overhydration and amorphization have been observed. No noticeable dissolution of datolite in the water medium occurred at 5 GPa and 250 °С after 3 h, which corresponds to typical conditions of the ‘cold’ zones of slab subduction. Copyright © 2014 John Wiley & Sons, Ltd.

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Держатели документа:
VS Sobolev Inst Geol & Mineral SB RAS, Novosibirsk 630090, Russia.
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia.
Univ Saskatchewan, Dept Geol Sci, Saskatoon, SK S7N 5E2, Canada.

Доп.точки доступа:
Goryainov, S. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Pan, Y.; Russian Foundation for Basic Research [N 14-05-00616, 13-05-00185]; Ministry of Education and Science of the Russian Federation
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    Behavior of CaBSiO4(OH) datolite at high temperatures and pressures of a water medium / S. V. Goryainov [et al.] // Bull. Russ. Acad. Sci. Phys. - 2015. - Vol. 79, Is. 6. - P. 794-797, DOI 10.3103/S1062873815060118. - Cited References: 9. - This work was supported by the Russian Foundation for Basic Research, project nos. 13-05-00185 and 4-05-00616. . - ISSN 1062-8738
Рубрики:
Constant pressures
   Constant temperature
   High temperature
   Polymorphic transitions
   T parameter
   Tectonic plates
   Water mediums
   Silicate minerals
Аннотация: The behavior of CaBSiO4(OH) datolite compressed in a water medium at simultaneous high temperatures and pressures corresponding to the cold zones of tectonic plate subduction (up to P ~5.3 GPa and T ~250°C) is studied in situ via Raman spectroscopy. Two polymorphic transitions are found: (i) upon an increase of up to 2 GPa in pressure at a constant temperature of 22°C and (ii) upon heating to ~90°C at a constant pressure of ~5–5.3 GPa. Major trends of the variations in the Raman spectra are identified for all phases of the indicated P–T parameters. No overhydration and amorphization of datolite is observed. © 2015, Allerton Press, Inc.

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Публикация на русском языке Поведение датолита CaBSiO4(OH) при высоких температурах и давлениях водной среды [Текст] / С. В. Горяйнов [и др.] // Изв. РАН. Сер. физич. - 2015. - Т. 79 № 6. - С. 880–883

Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
University of Saskatchewan, Saskatoon, SK, Canada

Доп.точки доступа:
Goryainov, S. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Pan, Y.
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