The pressure-volume relation of ytterbium up to 9GPa

Ushadevi, S and Singh, AK (1984) The pressure-volume relation of ytterbium up to 9GPa. Bulletin of Materials Science, 6 (2). pp. 395-403.

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Abstract

The pressure volume relation of ytterbium has been determined up to 9GPa using tungsten carbide opposed anvil high pressure x-ray camera. The fcc phase of ytterbium is observed between one atmosphere and 4GPa and the bcc phase above 3-5 GPa. The bcc phase can be metastably retained down to 1GPa by gradually decreasing the pressure from a region where only bcc phase alone is observed. The bulk modulus,B0, are determined by fitting murnaghan equation to the pressure volume data. The following values were obtained: Bo=16.3GPa and B0=3.6 for the suggested that the thermodynamic equilibrium pressure for fcc=bcc transformation in ytterbium is below 3-5GPa. The valence change under pressure has been discussed.

Item Type: Article
Additional Information: Copyright for this article belongs to Indian Academy of Sciences
Uncontrolled Keywords: Equation of state;X-ray diffraction;Ytterbium
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
CHEMISTRY AND MATERIALS > Metals and Metallic Materials
Depositing User: M/S ICAST NAL
Date Deposited: 28 Apr 2008
Last Modified: 17 Jun 2010 05:27
URI: http://nal-ir.nal.res.in/id/eprint/4694

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