Abstract A technique for density measurement under high pressure and high temperature was developed using the X-ray absorption imaging method combined with an externally heated diamond anvil cell. The densities of solid and liquid In were measured in the pressure and temperature ranges of 3.2–18.6 GPa and 294–719 K. The densities obtained through the X-ray absorption imaging method were in good agreement (less than 2.0% difference) with those obtained through X-ray diffraction. Based on the measured density, the isothermal bulk modulus of solid In is determined as 48.0 ± 1.1−40.9 ± 0.8 GPa at 500 K, assuming K ′ = 4 to 6. The compression curve of liquid In approaches that of solid In at higher pressures and does not cross over the solid compression curve in the measurement range. The present technique enables us to determine the densities of both solids and liquids precisely in a wide pressure and temperature range.

中文翻译：

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使用 X 射线吸收成像结合外部加热金刚石砧座开发高压和高温下的金属密度测量

摘要 利用X射线吸收成像方法结合外加热金刚石砧座，开发了一种高压高温密度测量技术。固体和液体 In 的密度在 3.2-18.6 GPa 和 294-719 K 的压力和温度范围内测量。通过 X 射线吸收成像方法获得的密度与那些一致（小于 2.0% 的差异）通过 X 射线衍射获得。根据测得的密度，假设 K ′ = 4 到 6，固体 In 的等温体积模量确定为 48.0 ± 1.1−40.9 ± 0.8 GPa at 500 K，假设 K ' = 4 到 6。在更高压力下，液体 In 的压缩曲线接近固体 In并且不跨越测量范围内的实心压缩曲线。