menucheckCIF procedure
PLAT036
PLAT036 Type_1 Check for missing Flack parameter s.u.
No standard uncertainty found for the Flack parameter. When the structure refinement was done with SHELXL97-2, the likely reason for this is a missing BASF instruction. This applies in particular when the associated Flack parameter has the value 0.000. No valid conclusions on the absolute structure can be drawn in that case.
