Alunite
      Hendricks S B
      American Mineralogist 22 (1937) 773-784
      The crystal structures of alunite and the jarosites
      _database_code_amcsd 0000016

      CELL PARAMETERS:    6.9600   6.9600  17.3500   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    727.861
      Density (g/cm3):      2.793
      MAX. ABS. INTENSITY / VOLUME**2:      17.03579187    
      RIR:      1.986
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.56          7.20        5.6937    1   0   1         6
                17.92         25.65        4.9500    0   1   2         6
                25.60         18.16        3.4800    1   1   0         6
                29.71          4.86        3.0073    0   1   5         6
                29.97        100.00        2.9818    1   1   3        12
                30.10         29.21        2.9693    0   2   1         6
                30.92          3.63        2.8917    0   0   6         2
                36.30          9.53        2.4750    0   2   4         6
                39.30         30.24        2.2923    1   0   7         6
                39.61          4.75        2.2754    2   0   5         6
                39.91          2.21        2.2588    2   1   1        12
                40.56          1.03        2.2241    1   1   6        12
                40.96          4.66        2.2035    1   2   2        12
                47.14          1.88        1.9278    0   0   9         2
                47.50          3.44        1.9143    0   2   7         6
                47.93         24.66        1.8979    0   3   3         6
                51.94          2.26        1.7603    2   0   8         6
                52.60         31.45        1.7400    2   2   0         6
                54.73          3.81        1.6773    2   1   7        12
                55.08          1.18        1.6673    1   0  10         6
                55.71          1.30        1.6500    0   3   6         6
                58.78          3.24        1.5708    1   2   8        12
                59.24          1.17        1.5599    1   3   4        12
                61.69         20.40        1.5036    0   2  10         6
                62.27          6.34        1.4909    2   2   6        12
                65.58          2.70        1.4234    4   0   4         6
                66.96          2.42        1.3975    2   0  11         6
                67.59          4.95        1.3860    1   3   7        12
                68.74          1.91        1.3656    2   3   2        12
                71.76          1.34        1.3153    4   1   0        12
                72.54          1.21        1.3031    1   0  13         6
                73.56          1.06        1.2876    4   0   7         6
                73.89          2.54        1.2826    1   4   3        12
                73.89          6.22        1.2826    4   1   3        12
                79.34          5.63        1.2076    3   2   7        12
                79.64          1.92        1.2038    1   3  10        12
                84.05          4.22        1.1516    2   1  13        12
                85.32          3.75        1.1377    4   0  10         6
                85.35          1.14        1.1373    3   3   3        12
                88.81          1.06        1.1017    2   4   4        12
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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.