Crystallographic Information Framework

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Core dictionary (coreCIF) version 2.4.5




   This item gives an estimate of the precision resulting
   from the numerical approximations made during the evaluation
   of the structure factors using the expression given in
   _refine_ls_F_calc_formula following the method outlined
   in _refine_ls_F_calc_details.  For X-ray diffraction the
   result is given in electrons.

The permitted range is 0.0 -> infinity

Type: numb

Category: refine