Melting of dense sodium

E Gregoryanz, O Degtyareva, M Somayazulu, RJ Hemley, HK Mao

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number185502
Number of pages4
JournalPhysical Review Letters
Volume94
Issue number18
DOIs
Publication statusPublished - 13 May 2005

Keywords

  • HIGH-PRESSURE PHASES
  • DIAMOND-ANVIL CELL
  • ALKALI-METALS
  • LITHIUM
  • TRANSITION
  • HYDROGEN
  • SUPERCONDUCTIVITY
  • SYSTEMATICS
  • POTASSIUM
  • CURVES

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