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.

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.)

单词	neumann's principle
释义	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. 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.)
随便看	brigade des sapeur-pompiers de paris brigade de sûreté urbaine brigade de transmissions et d'appui au commandement brigade de vérification des comptabilités informatisées brigade départementale de renseignements judiciaires brigade engineering battalion brigade franco-allemande brigade française libre brigade general brigadegeneral brigade hardcore française brigade headquarters group brigade incident reporting system brigade inspection reconnaissance exercise program brigade inspector brigade intelligence and communication brigade intelligence support element brigade internationaliste brigade judge advocate brigade-laboratory method brigade landing team brigade logistics support team brigade légère blindée brigade main command post brigade main engineer cell