Title

Pressure-Volume-Temperature Behavior of Fayalite Based on Static Compression Measurements at 400°C

Abstract

Twenty-one energy-dispersive X-ray diffraction spectra for fayalite at 400° C constitute the basis for an elevated-temperature static compression isotherm for this important silicate mineral. A Murnaghan regression of the resulting molar volumes yields 103.8 GPa and 7.1 for the 400° C, room-pressure values of the isothermal bulk modulus (K 0) and its first pressure derivative (K′0), respectively. When compared to the room-temperature static compression isotherm of Yagi et al. (1975), our 400° C value for K 0 yields 5.4 ×10−2 GPa/deg for (∂K/∂T)00. When combined with literature volume data, our measurements indicate that the fayalite isochores are strongly concave toward the pressure axis [(∂ 2 T/∂P 2) v <0].

Department(s)

Geography, Geology, and Planning

Document Type

Article

DOI

https://doi.org/10.1007/bf00201452

Publication Date

6-12-1905

Journal Title

Physics and Chemistry of Minerals

Share

COinS