checkCIF procedure

PLAT059

 The Minimum transmission factor should be specified in case a correction   
 for absorption was done. This is NOT the value that is calculated  
 automatically with SHELXL when a SIZE instruction is given in the SHELXL   
 instruction file. The values reported by SHELXL represent the EXPECTED 
 correction range. Some correction packages (e.g. SADABS) will provide  
 only one 'relative-correction-factor'. In such cases, Tmax should be   
 given as Tmax-expected and Tmin = relative-correction-factor * Tmax.