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    In situ Raman study of wairakite and dawsonite interaction with water at high P–T parameters / S. V. Goryainov [et al.] // Bull. Russ. Acad. Sci. Phys. - 2016. - Vol. 80, Is. 5. - P. 522-524, DOI 10.3103/S1062873816050087. - Cited References: 14. - This work was supported by the Russian Foundation for Basic Research, project nos. 14-05-00616 and 15-55-45070-IND, and the Russian Science Foundation, project no. 15-17-30012 . - ISSN 1062-8738
Кл.слова (ненормированные):
Waterworks -- Glass-like phase -- High temperature -- In-situ Raman spectroscopy -- Phillipsite -- Situ Raman -- T parameter -- Water mediums -- Water system -- Zeolites
Аннотация: The behavior of wairakite CaAl2Si4O12 · 2H2O and dawsonite NaAlCO3(OH)2 in a water medium is studied by means of in situ Raman spectroscopy at the simultaneously high temperatures and pressures (up to T = 723 K and P = 1 GPa). After the initial minerals are partially dissolved, phillipsite forms in the wairakite–water system, and a glass-like phase is generated in the dawsonite–water system. These minerals show no signs of overhydration. The amorphization of the wairakite structure that occurs at high temperatures and pressures was reversible. © 2016, Allerton Press, Inc.

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Публикация на русском языке In situ КР-исследование взаимодействия вайракита и давсонита с водой при высоких Р–Т-параметрах [Текст] / С. В. Горяйнов [и др.] // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 5. - С. 578

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
National Geophysical Research Institute, Council for Scientific and Industrial Research, Hyderabad, India

Доп.точки доступа:
Goryainov, S. V.; Горяйнов, Сергей Владимирович; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Likhacheva, A. Y.; Лихачева, Анна Юрьевна; Prasad, P. S. R.
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2.


   
    The behavior of zeolites wairakite and phillipsite at high P-T parameters / U. Borodina, S. Goryainov, S. Krylova [et al.] // Spectrochim. Acta A. - 2022. - Vol. 273. - Ст. 120979, DOI 10.1016/j.saa.2022.120979. - Cited References: 51 . - ISSN 1386-1425
Кл.слова (ненормированные):
Wairakite -- Phillipsite -- Zeolites -- Raman -- High pressure -- High temperature
Аннотация: In situ investigation of mineral behavior in water medium at simultaneously high P-T parameters can be applied to modelling of mineral transformation processes in lithospheric plates. The behavior of zeolites wairakite and phillipsite under the P-T conditions of «cold» slab subduction, corresponding to the start of oceanic plate diving or ocean floor near geothermal sources, was studied by in situ Raman spectroscopy. During compression in water medium, phillipsite initial phase is stable up to T = 350 °C, P = 1.7 GPa and with further increase of P-T parameters, phillipsite undergoes amorphization and partially dissolves in water. Wairakite compressed in water medium has a polymorphic transformation at T ≈ 300 °C and P ≈ 0.4 GPa. At 300–450 °C and P = 1 GPa the Raman spectrum almost disappears due to the amorphization of wairakite. Zeolite wairakite partially dissolves, and other zeolite phillipsite grows out of the fluid at T = 450 °C and P = 1 GPa. This transformation indicates the higher stability of phillipsite in comparison to wairakite. The in situ observed high P-T stability of phillipsite, which does not transform to other zeolites, and its formation from wairakite may indicate ф possible widespread distribution of this zeolite in marine sediments. By using the plane-wave pseudo-potential method, ab initio DFT calculations of Raman and FTIR spectra of wairakite were carried out. Comparing theoretical and experimental spectra, interpretation of the vibrational spectra of both zeolites was suggested.

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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, pr. Acad. Koptyug 3, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Academgorodok 50/38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Borodina, U.; Goryainov, S.; Krylova, S. N.; Крылова, Светлана Николаевна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич
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