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Characterization of high pressure and natural samples by Raman spectroscopy

Research Project

Project/Area Number 12440150
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionOKAYAMA UNIVERSITY

Principal Investigator

WALTER Michael  Institute for Study of Earth's Interior, Okayama University, Professor, 固体地球研究センター, 教授 (20284094)

Co-Investigator(Kenkyū-buntansha) KATSURA Tomoo  Institute for Study of Earth's Interior, Okayama University, Associate Professor, 固体地球研究センター, 助教授 (40260666)
KANZAKI Masami  Institute for Study of Earth's Interior, Okayama University, Associate Professor, 固体地球研究センター, 助教授 (90234153)
ITO Eiji  Institute for Study of Earth's Interior, Okayama University, Professor, 固体地球研究センター, 教授 (00033259)
NAKAMURA Eizo  Institute for Study of Earth's Interior, Okayama University, Professor, 固体地球研究センター, 教授 (80201672)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2000: ¥12,900,000 (Direct Cost: ¥12,900,000)
KeywordsRaman spectroscopy / diamond anvil cell / mineral inclusions / in situ mineral analysis
Research Abstract

In the proposal period we purchased and installed the equipment needed for a micro-Raman spectroscopy system, as well as the Type II diamonds needed for in situ spectroscopy in the diamond anvil cell. The installed Raman microprobe system was designed specifically to meet the needs of our high-pressure materials research group, and for the investigation of Earth and solar system materials. The installed system has achieved a very high performance, with a spectral resolution of about 0.5 nm and high optical throughput. This system is now used routinely in our lab for identification of phases synthesized in high-pressure experiments and to investigate natural minerals. In the proposal period we have used micro-Raman to identify many synthetic and natural silicate and oxide phases and have built a file to use as reference standards. We have also used the micron-Raman system to positively identify the existence of a high-pressure polymorph of SiO_2, coesite, in eclogite xenoliths from the Colorado plateau, the first reported for eclogites of this region. We have used the system to investigate the effect on melt speciation and polymerization of adding sulfur to sodium silicate melts, and are continuing investigations into melt speciation in depolymerized silicate systems. The micro-Raman system is also used routinely in our lab to measure pressure in situ in the diamond anvil cell using Ruby fluorescence. We are continuing to be engaged in projects in which Raman microscopy plays an important role.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report

URL: 

Published: 2000-04-01   Modified: 2021-04-07  

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