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Core CIF Dictionary version 2.3




Category: refln

Data type: char

Must appear in a looped list containing '_refln_index_'
Must match a value of '_reflns_class_code'


   The code identifying the class to which this reflection has been
   assigned. This code must match a value of _reflns_class_code.
   Reflections may be grouped into classes for a variety of
   purposes. For example, for modulated structures each reflection
   class may be defined by the number m=sum|m~i~|, where the m~i~
   are the integer coefficients that, in addition to h,k,l, index
   the corresponding diffraction vector in the basis defined
   for the reciprocal lattice.

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