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Allotropic Modifications of Diamond

Raman, CV (1945) Allotropic Modifications of Diamond. In: Nature, 156 (3949). pp. 22-23.

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THE relationships which exist between the structural symmetry of a molecule and its spectroscopic behaviour have been fully worked out by Placzek. One result of his theory is that if a molecule has the symmetry of the crystallographic point-group Oh, the activity of its vibrations in infra-red absorption and in light-scattering are mutually exclusive. On the other hand, if the molecular symmetry is that of the point-group Td, every vibration of the triply degenerate class must appear both in light-scattering and in infra-red absorption, or else be absent in both.

Item Type: Journal Article
Publication: Nature
Publisher: Nature Publishing Group
Additional Information: Copyright for this article belongs to Nature Publishing Group.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 20 Oct 2008 06:10
Last Modified: 19 Sep 2010 04:51
URI: http://eprints.iisc.ac.in/id/eprint/16347

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