Actions

Difference between revisions of "Incommensurate modulated structure"

From Online Dictionary of Crystallography

m
Line 4: Line 4:
 
<Font color="blue">Structure modul&eacute;e incommensurable </font>(Fr.)
 
<Font color="blue">Structure modul&eacute;e incommensurable </font>(Fr.)
  
'''Definition'''
+
== Definition ==
  
 
An  ''incommensurate modulated crystal structure'' is a [[modulated crystal structure]], for which
 
An  ''incommensurate modulated crystal structure'' is a [[modulated crystal structure]], for which
Line 12: Line 12:
 
wave vectors of the modulation with respect to  the basis structure should be irrational.
 
wave vectors of the modulation with respect to  the basis structure should be irrational.
  
'''See also''':  [[Quasiperiodicity]]
+
== See also ==
 +
[[Quasiperiodicity]]

Revision as of 15:21, 30 June 2010

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