Kettnerite
      Grice J D, Cooper M A, Hawthorne F C
      The Canadian Mineralogist 37 (1999) 923-927
      Crystal-structure determination of twinned kettnerite
      _database_code_amcsd 0005626

      CELL PARAMETERS:    3.7976   3.7976  13.5690   90.000   90.000   90.000
      SPACE GROUP: Pmmn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    195.689
      Density (g/cm3):      5.838
      MAX. ABS. INTENSITY / VOLUME**2:      331.3824300    
      RIR:     18.481
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.51        100.00       13.5690    0   0   1         2
                13.05          9.26        6.7845    0   0   2         2
                24.34         10.54        3.6571    1   0   1         4
                24.34          4.33        3.6571    0   1   1         4
                26.27          5.02        3.3923    0   0   4         2
                26.91          8.84        3.3138    1   0   2         4
                26.91         12.85        3.3138    0   1   2         4
                30.74         22.87        2.9084    1   0   3         4
                30.74         28.09        2.9084    0   1   3         4
                33.01          5.96        2.7138    0   0   5         2
                33.37         16.09        2.6853    1   1   0         4
                34.03         13.15        2.6342    1   1   1         8
                35.48          4.88        2.5299    1   0   4         4
                35.48          2.47        2.5299    0   1   4         4
                35.97          1.01        2.4968    1   1   2         8
                39.86          2.82        2.2615    0   0   6         2
                42.96         14.30        2.1055    1   1   4         8
                47.64          4.90        1.9088    1   1   5         8
                47.91          5.86        1.8988    0   2   0         2
                47.91          4.15        1.8988    2   0   0         2
                48.40          1.87        1.8805    0   2   1         4
                48.40          2.33        1.8805    2   0   1         4
                49.87          1.53        1.8285    2   0   2         4
                52.93          9.85        1.7298    1   1   6         8
                53.04          3.37        1.7265    1   0   7         4
                53.04          4.01        1.7265    0   1   7         4
                54.45          2.85        1.6852    2   1   1         8
                54.45          2.31        1.6852    1   2   1         8
                55.46          1.67        1.6569    2   0   4         4
                55.46          1.35        1.6569    0   2   4         4
                55.80          2.26        1.6475    2   1   2         8
                55.80          2.56        1.6475    1   2   2         8
                58.01          6.32        1.5899    2   1   3         8
                58.01          6.79        1.5899    1   2   3         8
                59.41          1.13        1.5558    2   0   5         4
                59.41          1.97        1.5558    0   2   5         4
                59.71          1.71        1.5487    1   0   8         4
                59.71          2.11        1.5487    0   1   8         4
                61.01          2.16        1.5186    2   1   4         8
                61.01          1.81        1.5186    1   2   4         8
                64.03          1.61        1.4542    2   0   6         4
                64.03          1.41        1.4542    0   2   6         4
                66.76          1.61        1.4013    1   0   9         4
                66.76          1.21        1.4013    0   1   9         4
                69.24          1.15        1.3569    0   0  10         2
                70.08          2.30        1.3427    2   2   0         4
                70.48          1.39        1.3361    2   2   1         8
                74.24          2.09        1.2774    2   1   7         8
                74.24          2.23        1.2774    1   2   7         8
                76.27          1.21        1.2484    2   2   4         8
                78.46          1.42        1.2190    3   0   3         4
                78.46          1.46        1.2190    0   3   3         4
                79.07          1.49        1.2111    1   1  10         8
                79.87          1.33        1.2009    3   1   0         4
                79.87          1.12        1.2009    1   3   0         4
                79.94          1.36        1.2001    1   2   8         8
                79.94          1.25        1.2001    2   1   8         8
                83.79          1.46        1.1545    2   2   6         8
                85.84          1.34        1.1321    3   1   4         8
                85.84          1.43        1.1321    1   3   4         8
                86.27          1.61        1.1275    2   1   9         8
                86.27          1.46        1.1275    1   2   9         8
                86.90          1.05        1.1209    1   1  11         8
                88.58          1.09        1.1040    0   2  10         4
                89.17          1.02        1.0982    3   1   5         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.