Br H4 N
      Bartlett G, Langmuir I
      Journal of the American Chemical Society 43 (1921) 84-91
      The crystal structure of the ammonium halides above and below the
      transition temperature
      _cod_database_code 1011300
      _database_code_amcsd 0018147

      CELL PARAMETERS:    3.9880   3.9880   3.9880   90.000   90.000   90.000
      SPACE GROUP: Pm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     63.426
      Density (g/cm3):      2.458
      MAX. ABS. INTENSITY / VOLUME**2:      76.75438499    
      RIR:     10.166
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                22.29         61.67        3.9880    1   0   0         6
                31.73        100.00        2.8199    1   1   0        12
                39.12         18.22        2.3025    1   1   1         8
                45.49         16.23        1.9940    2   0   0         6
                51.22         24.05        1.7835    2   1   0        24
                56.52         30.89        1.6281    2   1   1        24
                66.29          8.82        1.4100    2   2   0        12
                70.89          2.08        1.3293    3   0   0         6
                70.89          8.33        1.3293    2   2   1        24
                75.37         11.40        1.2611    3   1   0        24
                79.75          5.76        1.2024    3   1   1        24
                84.08          2.71        1.1512    2   2   2         8
                88.37          4.34        1.1061    3   2   0        24
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.