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Modulated and composite structures dictionary (msCIF) version 1.0.1




   The modulation of the atomic thermal parameters is usually
   parameterized by Fourier series. Each term of the series
   commonly adopts two different representations: the sine-cosine
            U(ij)c cos(2\p k r)+U(ij)s sin(2\p k r),
   and the modulus-argument form,
            |U(ij)| cos(2\p k r+\c),
   where k is the wave vector of the term and r is the atomic
   average position. _atom_site_U_Fourier_param_phase is the phase
   (\c/2\p), in cycles, of the complex amplitude corresponding to
   the Fourier term defined by _atom_site_U_Fourier_atom_site_label,
   _atom_site_U_Fourier_tens_elem and

Appears in list containing _atom_site_U_Fourier_param_id
The permitted range is -1.0 -> 1.0
Enumeration default: 0.0

Type: numb

Category: atom_site_U_Fourier_param