Modulated and composite structures dictionary (msCIF) version 1.0.1
The phason coefficient used to calculate (with the appropriate expression given in _atom_site_phason_formula) the atomic phason correction. Although this kind of correction is intended to be overall, some refinement programs (for example, JANA2000) allow an independent phason correction for each atom or rigid group. In this case, _atom_site_phason_formula and _atom_site_phason_coeff should be used (see also _refine_ls_mod_overall_phason_).
Appears in list containing _atom_site_phason_atom_site_label
The permitted range is 0.0 -> infinity
Enumeration default: 0.0