Alunite
      Zema M, Callegari A M, Tarantino S C, Gasparini E, Ghigna P
      Mineralogical Magazine 76 (2012) 613-623
      Thermal expansion of alunite up to dehydroxylation
      and collapse of the crystal structure
      Note: T = 300 C
      Locality: Hungary
      _database_code_amcsd 0018987

      CELL PARAMETERS:    6.9859   6.9859  17.4810   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    738.825
      Density (g/cm3):      2.751
      MAX. ABS. INTENSITY / VOLUME**2:      15.11738774    
      RIR:      1.790
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.21          1.76        5.8270    0   0   3         2
                15.50         15.62        5.7173    1   0   1         6
                17.83         59.00        4.9745    0   1   2         6
                25.50         28.08        3.4929    1   1   0         6
                29.51          5.35        3.0271    0   1   5         6
                29.82        100.00        2.9959    1   1   3        12
                29.98         26.46        2.9807    0   2   1         6
                30.69          8.60        2.9135    0   0   6         2
                36.11          4.91        2.4873    0   2   4         6
                39.02         34.15        2.3084    1   0   7         6
                39.39          2.67        2.2876    2   0   5         6
                40.79          5.76        2.2122    1   2   2        12
                44.73          1.27        2.0261    2   1   4        12
                46.77          5.63        1.9423    0   0   9         2
                47.72         32.52        1.9058    0   3   3         6
                47.72          1.19        1.9058    3   0   3         6
                51.60          1.37        1.7713    2   0   8         6
                52.39         22.87        1.7465    2   2   0         6
                55.79          2.67        1.6479    3   1   2        12
                58.42          2.04        1.5798    1   2   8        12
                58.96          1.02        1.5665    1   3   4        12
                61.24         18.40        1.5135    0   2  10         6
                61.28          2.64        1.5128    3   1   5        12
                61.54          1.14        1.5069    4   0   1         6
                61.95          7.93        1.4980    2   2   6        12
                62.30          1.99        1.4903    0   4   2         6
                65.28          2.56        1.4293    4   0   4         6
                66.88          1.61        1.3990    0   3   9         6
                67.22          3.65        1.3928    1   3   7        12
                67.47          1.07        1.3882    0   4   5         6
                68.44          2.92        1.3708    2   3   2        12
                71.46          2.03        1.3202    4   1   0        12
                71.93          1.82        1.3127    1   0  13         6
                72.83          2.05        1.2987    2   2   9        12
                73.56          2.59        1.2876    1   4   3        12
                73.56          4.63        1.2876    4   1   3        12
                78.91          6.54        1.2132    3   2   7        12
                79.11          2.77        1.2105    1   3  10        12
                81.51          1.88        1.1809    0   3  12         6
                82.92          1.09        1.1643    3   3   0         6
                83.38          4.31        1.1591    2   1  13        12
                84.75          2.61        1.1438    4   0  10         6
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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.