Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2011 Joint Annual Meeting of Japan Association of Mineralogical Sciences and The Geological Society of Japan
Session ID : R3-06
Conference information
R3: High-pressure science and deep Earth's material
Determination of Grüneisen parameter of calcium ferrite-type MgAl2O4 by high-pressure Raman spectroscopy
*Hiroshi Kojitani, Masaki Akaogi, Daniel Többens
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Keywords: Raman spectroscopy, Grüneisen parameter, high-pressure, calcium ferrite, lattice vibration
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Abstract
Calcium ferrite-type MgAl2O4 is one of major endmembers of a calcium ferrite phase. In this study, mode Grüneisen parameters of calcium ferrite-type MgAl2O4 were determined from pressure dependences of lattice vibrational frequencies by high-pressure micro-Raman spectroscopy using a diamond anvil cell apparatus. By combining them with the results of a vibrational mode calculation, the thermal Grüneisen parameter was obtained to be 1.50(5) from a weighted average of the mode Grüneisen parameters for all optic modes.
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© 2011 Japan Association of Mineralogical Sciences
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