The thermoelastic parameters of natural andradite and grossular have been investigated by high-pressure and -temperature synchrotron X-ray powder diffraction, at ESRF, on the ID30 beamline. The P-V-T data have been fitted by Birch-Murnaghan-like EOSs, using both the approximated and the general form. We have obtained for andradite Ko = 158.0(±1.5) GPa, (dK/dT)o = -0.020(3) GPa K-1 and αo = 31.6(2) 10-6 K-1, and for grossular Ko = 168.2(±1.7) GPa, (dK/dT)o = -0.016(3) GPa K-1 and αo = 27.8(2) 10-6 K-1. Comparisons between the present issues and thermoelastic properties of garnets earlier determined are carried out.

Pressure-Volune-Temperature equation of state of andradite and grossular, by high pressure and temperature powder diffraction / A. Pavese, V. Diella, V. Pischedda, M. Merli, R. Bocchio, M. Mezouar. - In: PHYSICS AND CHEMISTRY OF MINERALS. - ISSN 0342-1791. - 28:4(2001), pp. 242-248.

Pressure-Volune-Temperature equation of state of andradite and grossular, by high pressure and temperature powder diffraction

A. Pavese
Primo
;
R. Bocchio
Penultimo
;
2001

Abstract

The thermoelastic parameters of natural andradite and grossular have been investigated by high-pressure and -temperature synchrotron X-ray powder diffraction, at ESRF, on the ID30 beamline. The P-V-T data have been fitted by Birch-Murnaghan-like EOSs, using both the approximated and the general form. We have obtained for andradite Ko = 158.0(±1.5) GPa, (dK/dT)o = -0.020(3) GPa K-1 and αo = 31.6(2) 10-6 K-1, and for grossular Ko = 168.2(±1.7) GPa, (dK/dT)o = -0.016(3) GPa K-1 and αo = 27.8(2) 10-6 K-1. Comparisons between the present issues and thermoelastic properties of garnets earlier determined are carried out.
Settore GEO/06 - Mineralogia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/179216
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