Acta Cryst. (2003). E59, i14-i16  [ doi:10.1107/S160053680300117X ]

Ammonium dipotassium hydrogen difluorophosphate at room temperature

J. Fábry, R. Krupková and I. Císarová

Online 24 January 2003

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (P-O) = 0.001 Å
• Disorder in solvent or counterion
• R factor = 0.021
• wR factor = 0.054
• Data-to-parameter ratio = 11.9

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level B:



CHEMS_01  Alert B The sum formula contains elements in the wrong order.         
          H  precedes F                                                         
          Sequence must be C, H, then alphabetical.                             

 Alert Level C:



ABSTM_02  Alert C The ratio of expected to reported Tmax/Tmin(RR) is > 1.10     
          Tmin and Tmax reported:      0.715     0.796                          
          Tmin and Tmax expected:      0.626     0.786                          
          RR =      1.129                                                       
          Please check that your absorption correction is appropriate.          

PLAT_302  Alert C Anion/Solvent Disorder .......................      33.00 Perc.

General Notes



FORMU_01  There is a discrepancy between the atom counts in the                 
          _chemical_formula_sum and _chemical_formula_moiety. This is           
          usually due to the moiety formula being in the wrong format.          
          Atom count from _chemical_formula_sum:   H4.704 F2 K2.074 N0.926 O6 P 
          Atom count from _chemical_formula_moiety:N0.926 P1.852                


 0 Alert Level A = Potentially serious problem

 1 Alert Level B = Potential problem

 2 Alert Level C = Please check

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