Raman spectroscopic study of pressure-induced phase transitions in tridymite modifications

被引：1

作者：

Kanzaki, Masami ^{[1
]}

机构：

[1] Okayama Univ, Inst Planetary Mat, Misasa, Tottori 6820193, Japan

来源：

JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES | 2021年 / 116卷 / 05期

关键词：

SiO2; Tridymite; Raman spectroscopy; High; pressure phase; Phase transition; MC;

D O I：

10.2465/jmps.210729

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

Pressure-induced phase transitions of tridymite modifications (MC, MX-1, and PO-10) were investigated by in-situ Raman spectroscopy. Starting from MC, a transition to PO-10 was observed at 0.4 GPa. At about 1.6 GPa, new Raman peaks appeared and were observed up to 8.7 GPa. This revealed a new phase, and it reverted to PO-10 at around 0.4 GPa during decompression. Contrary to previous study, PO-10 was recovered to ambient pressure. MX-1 also transformed to PO-10, and PO-10 was recovered. Starting from PO-10, the transition to the new phase was also observed but was gradual and the phase reverted to PO-10 during decompression. Present study revealed a new route to form PO-10 from MC and suggests rare PO-10 found in meteorites could be formed through this route.

引用

页码：245 / 250

页数：6

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