Incommensurate modulated structure
From Online Dictionary of Crystallography
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Revision as of 14:10, 18 May 2009 by TedJanssen (talk | contribs)
Incommensurate modulated structure
Structure modulée incommensurable (Fr.)
Definition
An incommensurate modulated crystal structure is a modulated crystal structure, for which the modulation function has a Fourier transform of sharp peaks at wave vectors that cannot all be expressed by rational coefficients in a basis of the reciprocal lattice of the basic structure. At least one of the components of the wave vectors of the modulation with respect to the basis structure should be irrational.
See also: Quasiperiodicity