High pressure-high temperature phase diagram of ammonia
High pressure-high temperature phase diagram of ammonia
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DOI：
10.1063/1.2903491
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发表时间：
2008-04-21
影响因子：
4.4
通讯作者：
Datchi, F.
中科院分区：
文献类型：
--
作者：
Ninet, S.;Datchi, F.
用金刚石对顶砧和电阻加热技术研究了固态氨的高压（P）-高温（T）相图。在压缩和解压路径上，III-IV转变线已被确定为高达20 GPa和500 K。在III-IV-V三相点的预期位置未观察到不连续性。熔融线已确定的视觉观察的流-固平衡高达9 GPa和900 K。在所覆盖的P-T范围内，实验数据用Simon-Glatzel方程拟合得很好。这些过渡线和他们的外推报告从头计算进行比较。(c)2008年美国物理学会。
The high pressure (P)-high temperature (T) phase diagram of solid ammonia has been investigated using diamond anvil cell and resistive heating techniques. The III-IV transition line has been determined up to 20 GPa and 500 K both on compression and decompression paths. No discontinuity is observed at the expected location for the III-IV-V triple point. The melting line has been determined by visual observations of the fluid-solid equilibrium up to 9 GPa and 900 K. The experimental data are well fitted by a Simon-Glatzel equation in the covered P-T range. These transition lines and their extrapolations are compared to the reported ab initio calculations. (c) 2008 American Institute of Physics.