Acta Cryst. (2002). E58, o779-o781  [ doi:10.1107/S1600536802010656 ]

L-Methionine L-methioninium perchlorate monohydrate

B. Sridhar, N. Srinivasan, B. Dalhus and R. K. Rajaram

Online 21 June 2002

Key indicators

• Single-crystal X-ray study
• T = 105 K
• Mean (C-C) = 0.002 Å
• R factor = 0.029
• wR factor = 0.086
• Data-to-parameter ratio = 40.1

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry

General Notes



REFLT_03                                                                        
         From the CIF: _diffrn_reflns_theta_max           37.60                 
         From the CIF: _reflns_number_total               9018                  
         Count of symmetry unique reflns         5304                           
         Completeness (_total/calc)            170.02%                          
         TEST3: Check Friedels for noncentro structure                          
         Estimate of Friedel pairs measured      3714                           
         Fraction of Friedel pairs measured     0.700                           
         Are heavy atom types Z>Si present          yes                         
          Please check that the estimate of the number of Friedel pairs is      
          correct. If it is not, please give the correct count in the           
          _publ_section_exptl_refinement section of the submitted CIF.          

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