checkCIF procedure

PLAT792

 This test addresses the consistency of the absolute structure assignment   
 (i.e. polarity etc.) in non-centrosymmetric structures in space groups 
 that include improper symmetry operations (e.g. mirror planes).
 Check the (R/S) absolute configuration assignment of this atom and 
 the consistency of the absolute configuration implicit in the CIF-data 
 with that in the 'ORTEP' illustration.