Equation of state and compressibility of phlogopite by in-situ high-pressure X-ray powder diffraction

Alessandro Pavese, Davide Levy, Nadia Curetti, Valeria Diella, Patrizia Fumagalli, Alessandra Sani

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23 Scopus citations

Abstract

The elastic properties of a natural phlogopite have been studied by in-situ high-pressure X-ray powder diffraction experiments on the ID9 beamline at the ESRF, at room temperature. Several EoS models (Birch-Murnaghan, Vinet, Poirier-Tarantola) have been fitted to the experimental P-V data and the results obtained are presented and discussed. The third-order Birch-Murnaghan EoS, assuming Vo fixed at its experimental value, yields Ko=49.7(±0.5) GPa, Ko'=8.59(±0.19), Ko"=-0.5953 GPa-1 (implied value). The axial compressibilities at room conditions, determined by the third-order Birch-Murnaghan EoS, result in βEoSa0=3.48(5), βEoSb0=3.2(1), βEoSc0=13.2(1) 10-3 GPa-1. Equilibrium thermodynamic calculations have been carried out to show how the new elastic parameters here reported affect the stability field of phlogopite.

Original languageEnglish
Pages (from-to)455-463
Number of pages9
JournalEuropean Journal of Mineralogy
Volume15
Issue number3
DOIs
StatePublished - 2003
Externally publishedYes

Keywords

  • Compressibility
  • Equation of state
  • High pressure
  • Phlogopite

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