checkCIF procedure

PLAT045

 In the ideal case, both data items (Z(calc) & Z(reported)) should be   
 the same. If not, the reason for the difference should be clear. An example
 is the situation where PLATON gives Z = 1 when the program cannot work out 
 a proper Z.
 Note: Alerts _041, _042 & _045 can probably be ignored when the relevant   
 values differ by the same factor.