Structure, bonding, and geochemistry of xenon at high pressures
Structure, bonding, and geochemistry of xenon at high pressures
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DOI：
10.1126/science.277.5328.930
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发表时间：
1997-08-15
期刊：
影响因子：
56.9
通讯作者：
Jeanloz, R
中科院分区：
文献类型：
--
作者：
Caldwell, WA;Nguyen, JH;Jeanloz, R
虽然氙在压力超过100吉帕斯卡时会变成金属，但量子力学计算和高压-温度实验的结合表明，氙在至少100至150吉帕斯卡的压力下不会与铁或铂形成金属合金。氙从面心立方（fee）到六方密堆积（hop）结构的转变受到动力学阻碍，两相之间的体积和体积模量差异小于我们可以分辨的（分别小于0.3%和0.6吉帕斯卡）。平衡的fcc-hcp相界是21（+/-3）吉帕斯卡，这比以前认为的压力要低，地核不太可能是原始氙的储存库。
Although xenon becomes metallic at pressures above about 100 gigapascals, a combination of quantum mechanical calculations and high pressure-temperature experiments reveals no tendency on the part of xenon to form a metal alloy with iron or platinum to at least 100 to 150 gigapascals. The transformation of xenon from face-centered cubic (fee) to hexagonal close-packed (hop) structures is kinetically hindered, the differences in volume and bulk modulus between the two phases being smaller than we can resolve (less than 0.3 percent and 0.6 gigapascals, respectively). The equilibrium fcc-hcp phase boundary is at 21 (+/-3) gigapascals, which is a lower pressure than was previously thought, and it is unlikely that Earth's core serves as a reservoir for primordial xenon.