High-pressure Raman spectroscopy of calcium ferrite-type CaAl2O4

DOI

Bibliographic Information

Other Title
  • カルシウムフェライト型CaAl2O4の高圧ラマン分光測定

Description

It is accepted that a calcium ferrite phase is one of high-pressure constituent minerals of subducting oceanic crust at lower mantle conditions. Calcium ferrite-type CaAl2O4 is an endmember of the calcium ferrite phase. In this study, a high-pressure micro-Raman spectroscopy of the calcium ferrite-type CaAl2O4 was performed in the pressure range of 0-37 GPa at room temperature using a diamond anvil cell apparatus. Its thermodynamic Grüneisen parameter was determined to be 1.44 by averaging 26 of mode Grüneisen parameters which were derived from pressure dependence of lattice vibrational mode frequencies. Heat capacities at constant pressure calculated using the thermodynamic Grünesisen parameter are consistent with observed ones within the uncertainties. Also, it gives the thermal expansion coefficient of about 2.5x10^-5 1/K.

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Details 詳細情報について

  • CRID
    1390282680521315840
  • NII Article ID
    130004601503
  • DOI
    10.14824/jakoka.2010.0.109.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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