Heat capacity,compressibility and thermal expansion coefficient of ilmenite-type MgGeO3 |
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Authors: | T Ashida Y Miyamoto S Kume |
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Institution: | 1. College of General Education, Osaka University, 560, Toyonaka, Japan 2. Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, 567, Ibaraki, Japan
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Abstract: | The accuracy of differential scanning calorimetry (DSC) on a heat capacity measurement was evaluated using MgO. The result indicated that the deviation of the result in comparison to literature values was less than 0.4% at temperatures above 300 K and 2.1% below this temperature. Since this experiment proved the reliability of DSC, heat capacity, compressibility, and thermal expansion of ilmenite-type MgGeO3 were measured by means of DSC, a diamond anvil high pressure device, and a high-temperature X-ray camera, respectively. The heat capacity was approximated by C p = a + b·T + c·T ?2 at high temperatures and by the Debye function at low temperatures. The compressibility was well-represented by the Murnaghan-Birch equation of 2nd order. The thermal expansion coefficient was constant up to 1073 K. |
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