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 |
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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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