Estimation of single-crystal elastic moduli from polycrystalline x-ray diffraction at high pressure: application to FeO and Iron

Singh, AK and Mao, HK and Shu, J and Hemley, RJ (1998) Estimation of single-crystal elastic moduli from polycrystalline x-ray diffraction at high pressure: application to FeO and Iron. Physical Review Letters, 80 (10). pp. 2157-2160.

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    Abstract

    X-ray diffraction data obtained under nonhydrostatic compression of a polycrystalline sample yield13; an estimate of the single-crystal elasticity tensor of the material when analyzed using appropriate13; equations. The analysis requires as input the aggregate shear modulus from independent measurements.13; The high-pressure elastic moduli of face-centered-cubic FeO, body-centered-cubic iron (a-Fe), and the13; pressure-induced hexagonal close-packed iron (e-Fe) are obtained. This analysis currently provides13; the only method of determining single-crystal elasticity tensors in the megabar pressure range and of13; studying elasticity of very high-pressure phases.

    Item Type: Journal Article
    Additional Information: Copyright for this article belongs to American Physical Society
    Uncontrolled Keywords: Polycrystalline x-Ray diffraction;Seismic anisotropy; Synchrotron x-ray
    Subjects: PHYSICS > Physics(General)
    Division/Department: Materials Science Division, Other, Other, Other
    Depositing User: M/S ICAST NAL
    Date Deposited: 12 Sep 2008
    Last Modified: 17 Jun 2010 13:33
    URI: http://nal-ir.nal.res.in/id/eprint/4813

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