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, Jinfu 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:	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)
Depositing User:	M/S ICAST NAL
Date Deposited:	12 Sep 2008
Last Modified:	24 Sep 2015 05:48
URI:	http://nal-ir.nal.res.in/id/eprint/4813

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