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Macromolecular dictionary (mmCIF) version 2.0.09




   The value of sigma~a~ used in constructing the Luzzati plot for
   the reflections treated as a test set during refinement.
   Details of the estimation of sigma~a~ can be specified
   in _refine_analyze.Luzzati_sigma_a_free_details.

   Ref:  Luzzati, V. (1952). Traitement statistique des erreurs
   dans la determination des structures cristallines. Acta
   Cryst. 5, 802-810.

Type: float

Mandatory item: no

Category: refine_analyze