Index

Core dictionary version 3.0.14

_refine_ls.abs_structure_Flack

Definition:

   
     The measure of absolute structure as defined by Flack (1983).
     For centrosymmetric structures, the only permitted value, if the
     data name is present, is 'inapplicable', represented by '.' .
     For noncentrosymmetric structures, the value must lie in the
     99.97% Gaussian confidence interval  -3u =< x =< 1 + 3u and a
     standard uncertainty (e.s.d.) u must be supplied. The
     _enumeration.range of 0.0:1.0 is correctly interpreted as
     meaning (0.0 - 3u) =< x =< (1.0 + 3u).
     Ref: Flack, H. D. (1983). Acta Cryst. A39, 876-881.

Type: Real

Units: none

Category:
refine_ls