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].
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This is publication number 1125 of the School of Earth Sciences, Department of Geology and Geophysics, University of Minnesota, Minneapolis, MN 55455, USA
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Plymate, T.G., Stout, J.H. Pressure-volume-temperature behavior of fayalite based on static compression measurements at 400° C. Phys Chem Minerals 17, 212–219 (1990). https://doi.org/10.1007/BF00201452
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DOI: https://doi.org/10.1007/BF00201452
Keywords
- Silicate
- Mineral Resource
- Molar Volume
- Material Processing
- Bulk Modulus