checkCIF procedure

PLAT921

 Please check whether the supplied '.fcf' file corresponds with the '.cif'
 FILE produced in the same least squares refinement job. See at the end of
 Section #10 in the '.ckf' report file for details. The test is based on the
 observed and calculated F**2 in the '.fcf' file with weight parameters taken
 from the '.cif' file.  
 Note: F(obs)^2 values in a SHELXL generated FCF are corrected for extinction.