Neumann's Principle

Neumann's principle

[′nȯi‚mänz ‚prin·sə·pəl]
(crystallography)
The principle that the symmetry elements of the point group of a crystal are included among the symmetry elements of any property of the crystal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Neumann’s Principle

 

a postulate establishing the relation between the symmetry of the physical properties of a crystal and the symmetry of the crystal’s external form. According to the principle, the symmetry group of any physical property of crystals will include the symmetry elements of the point group of the crystal. The principle was established by F. E. Neumann.

REFERENCE

Nye, J. Fizicheskie svoistva kristallov i ikh opisanie pri pomoshchi tenzorov i matrits, 2nd ed. Moscow, 1967. (Translated from English.)
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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