checkCIF procedure

PLAT197

 Please specify the temperature (kelvin) at which the unit-cell parameters  
 were determined. That temperature should be generally identical to the 
 temperature value specified with '_diffrn_ambient_temperature' (the
 temperature of the crystal during data-collection) in order to make sense
 when used in the calculation of derived geometry parameter values (i.e. bond
 distances, bond angles etc.).