Melting of dense sodium

被引:175
作者
Gregoryanz, E
Degtyareva, O
Somayazulu, M
Hemley, RJ
Mao, HK
机构
[1] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA
[2] Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA
关键词
D O I
10.1103/PhysRevLett.94.185502
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
High-pressure high-temperature synchrotron diffraction measurements reveal a maximum on the melting curve of Na in the bcc phase at similar to 31 GPa and 1000 K and a steep decrease in melting temperature in its fcc phase. The results extend the melting curve by an order of magnitude up to 130 GPa. Above 103 GPa, Na crystallizes in a sequence of phases with complex structures with unusually low melting temperatures, reaching 300 K at 118 GPa, and an increased melting temperature is observed with further increases in pressure.
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页数:4
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