Modulated and composite structures dictionary (msCIF) version 1.0.1
Modulation parameters are usually looped in separate lists. Modulated parameters are the atom positions (displacive modulation), the atomic occupation (occupational modulation) and/or the atomic anisotropic (or isotropic) displacement parameters (referred to as modulation of thermal parameters, since the term 'displacement parameters' is ambiguous in this context). _atom_site_displace_Fourier_atom_site_label is the code that identifies an atom or rigid group in a loop in which the Fourier components of its displacive modulation are listed. In the case of a rigid group, this list would only include the translational part of its displacive modulation. The rotational part (if any) would appear in a separate list (see _atom_site_rot_Fourier_atom_site_label). This code must match the _atom_site_label of the associated coordinate list and conform to the rules described in _atom_site_label.
Appears in list containing _atom_site_displace_Fourier_id
Must match data name_atom_site_label