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Melting curve of potassium to 22 GPa

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Original languageEnglish
Article number054111
Pages (from-to)-
Number of pages7
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume84
Issue number5
DOIs
StatePublished - 12 Aug 2011

Abstract

The melting curve of potassium has been measured experimentally to 22 GPa using in situ X-ray diffraction and gas-membrane diamond anvil cells equipped with external resistive heating. The evolution of the melting temperature with pressure is similar to that of sodium, but it is different to that reported previously. A melting maximum is found in the stability field of the bcc-phase, at 5.8(5) GPa, followed by a decrease in the melting temperature down to a melting minimum at the fcc-host-guest (tI19) transition at 19(1) GPa. The bcc-fcc-liquid and fcc-tI19-liquid triple points are found to be at 466(10) K and 13.6(3) GPa and at 390(10) K and 19.0(3) GPa, respectively.

    Research areas

  • DIAMOND-ANVIL CELL, HIGH-PRESSURE, ALKALI-METALS, CRYSTAL-STRUCTURE, SODIUM, PHASE, LITHIUM, CESIUM, TRANSITIONS, SUPERCONDUCTIVITY

ID: 1387629