Phys. Rev. B 70, 012101 (2004) [4 pages]Bulk modulus of osmium: High-pressure powder x-ray diffraction experiments under quasihydrostatic conditionsReceived 22 April 2003; revised 23 February 2004; published 12 July 2004 High-pressure powder x-ray diffraction experiments have been carried out on Os at room temperature under quasihydrostatic conditions with a He-pressure medium. By fitting the pressure-volume data up to 58 GPa, the bulk modulus and its pressure derivative are determined to be B0=395(15) GPa and B0′=4.5(5). The bulk modulus of Os is smaller than that for diamond, in contrast with the conclusion drawn in a recent work [ H. Cynn et al. Phys. Rev. Lett. 88 135701 (2002)]. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.012101
DOI:
10.1103/PhysRevB.70.012101
PACS:
64.30.+t, 62.20.Dc, 62.50.+p, 61.66.Bi
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