In situ Raman study of wairakite and dawsonite interaction with water at high P–T parameters

The behavior of wairakite CaAl 2 Si 4 O 12 · 2H 2 O and dawsonite NaAlCO 3 (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...

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Published inBulletin of the Russian Academy of Sciences. Physics Vol. 80; no. 5; pp. 522 - 524
Main Authors Goryainov, S. V., Krylov, A. S., Vtyurin, A. N., Likhacheva, A. Yu, Prasad, P. S. R.
Format Journal Article
LanguageEnglish
Published New York Allerton Press 01.05.2016
Springer Nature B.V
Subjects
Amorphization
Dawsonite
Disorder
Hadrons
Heavy Ions
Minerals
Nuclear Physics
Physics
Physics and Astronomy
Proceedings of the International Interdisciplinary Symposium “Ordering in Minerals and Alloys” OMA-18 and Proceedings of the International Interdisciplinary Symposium “Order
Raman spectroscopy
Spectroscopic analysis
the Properties of Oxides” ODPO-18
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Summary:The behavior of wairakite CaAl 2 Si 4 O 12 · 2H 2 O and dawsonite NaAlCO 3 (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.
ISSN:1062-8738
1934-9432
DOI:10.3103/S1062873816050087