checkCIF procedure

PLAT433

 This test raised an ALERT for short intermolecular contacts between minor  
 disorder components. In general, intermolecular contact distances should be
 not much smaller than the sum of the associated van der Waals Radii. More  
 often than not, such short contacts can be a warning sign for errors. All  
 short contacts should therefore be examined in some detail. Interesting   
 exceptions are carbonyl-carbonyl interactions that often feature short O...C   
 contacts (see Allen et al. (1998) B54, 320-329).