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Anharmonic Effects in Germanium

Saravanan, RA and Mohanlal, SK and Nethaji, Munirathinam (1994) Anharmonic Effects in Germanium. In: Physica Status Solidi B, 183 (2). 359 -364.

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Official URL: http://dx.doi.org/10.1002/pssb.2221830202


A precise X-ray investigation is carried out to probe the lowest-order anharmonic contribution of the atomic potential of the germanium atom. A total number of 1052 reflections (h + k + l = 4n and 4n +/- 1) are precisely measured at room temperature using a spherical single crystal of germanium and using a Nonius CAD-4 X-ray diffractometer with crystal monochromatized MoKalpha radiation. A least-square refinement program is used to refine the harmonic and anharmonic thermal parameters of the crystal. The refinement gives beta(Ge) = (-0.749 +/- 1.79) x 10-(16) J nm-3 with B(Ge) = (0.528 +/- 0.004) x 10(-2) nm2. The reliability index (R) amounts to 1.71% for germanium.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Ms V Mangala
Date Deposited: 03 Aug 2011 10:07
Last Modified: 03 Aug 2011 10:07
URI: http://eprints.iisc.ac.in/id/eprint/36163

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