Compressibility of strontium orthophosphate Sr3(PO4)2 at high pressure

Shuangmeng Zhai, Weihong Xue, Daisuke Yamazaki, Shuangming Shan, Eiji Ito, Naotaka Tomioka, Akira Shimojuku, Ken ichi Funakoshi

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

High pressure in situ synchrotron X-ray diffraction experiment of strontium orthophosphate Sr3(PO4)2 has been carried out to 20.0 GPa at room temperature using multianvil apparatus. Fitting a third-order Birch-Murnaghan equation of state to the P-V data yields a volume of V0 = 498.0 ± 0.1 Å3, an isothermal bulk modulus of KT = 89.5 ± 1.7 GPa, and first pressure derivative of KT′ = 6.57 ± 0.34. If KT′ is fixed at 4, KT is obtained as 104.4 ± 1.2 GPa. Analysis of axial compressible modulus shows that the a-axis (Ka = 79.6 ± 3.2 GPa) is more compressible than the c-axis (Kc = 116.4 ± 4.3 GPa). Based on the high pressure Raman spectroscopic results, the mode Grüneisen parameters are determined and the average mode Grüneisen parameter of PO4 vibrations of Sr3(PO4)2 is calculated to be 0.30(2).

Original languageEnglish
Pages (from-to)357-361
Number of pages5
JournalPhysics and Chemistry of Minerals
Volume38
Issue number5
DOIs
Publication statusPublished - May 1 2011

Keywords

  • Equation of state
  • High pressure
  • Sr(PO)
  • Synchrotron X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Geochemistry and Petrology

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