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

IF 0.9 4区 地球科学 Q4 MINERALOGY
M. Kanzaki
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引用次数: 1

Abstract

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.
拉曼光谱研究压力诱导的钇铝石改性相变
利用原位拉曼光谱研究了三晶钇改性(MC、MX-1和PO-10)的压力诱导相变。从MC开始,在0.4 GPa时观察到PO-10的转变。在约1.6 GPa处出现新的拉曼峰,在8.7 GPa处观察到。这揭示了一个新的相,在减压过程中,它在0.4 GPa左右恢复到PO-10。与之前的研究相反,PO-10被恢复到环境压力。MX-1也转化为PO-10, PO-10被回收。从PO-10开始,也观察到向新相的转变,但这种转变是渐进的,并且在减压期间恢复到PO-10相。本研究揭示了MC形成PO-10的新途径,并提示陨石中罕见的PO-10可能通过这条途径形成。
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来源期刊
CiteScore
1.80
自引率
14.30%
发文量
5
审稿时长
>12 weeks
期刊介绍: The Journal of Mineralogical and Petrological Sciences (JMPS) publishes original articles, reviews and letters in the fields of mineralogy, petrology, economic geology, geochemistry, planetary materials science, and related scientific fields. As an international journal, we aim to provide worldwide diffusion for the results of research in Japan, as well as to serve as a medium with high impact factor for the global scientific communication Given the remarkable rate at which publications have been expanding to include several fields, including planetary and earth sciences, materials science, and instrumental analysis technology, the journal aims to encourage and develop a variety of such new interdisciplinary scientific fields, to encourage the wide scope of such new fields to bloom in the future, and to contribute to the rapidly growing international scientific community. To cope with this emerging scientific environment, in April 2000 the journal''s two parent societies, MSJ* (The Mineralogical Society of Japan) and JAMPEG* (The Japanese Association of Mineralogists, Petrologists and Economic Geologists), combined their respective journals (the Mineralogical Journal and the Journal of Mineralogy, Petrology and Economic Geology). The result of this merger was the Journal of Mineralogical and Petrological Sciences, which has a greatly expanded and enriched scope compared to its predecessors.
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