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 = 500 C
      Locality: Hungary
      _database_code_amcsd 0018990

      CELL PARAMETERS:    6.9935   6.9935  17.6400   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    747.168
      Density (g/cm3):      2.663
      MAX. ABS. INTENSITY / VOLUME**2:      13.64823866    
      RIR:      1.669
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.47         18.93        5.7283    1   0   1         6
                17.76         69.65        4.9928    0   1   2         6
                25.47         31.24        3.4968    1   1   0         6
                29.30          5.15        3.0485    0   1   5         6
                29.73        100.00        3.0055    1   1   3        12
                29.94         25.71        2.9846    0   2   1         6
                30.40          8.74        2.9400    0   0   6         2
                35.98          4.17        2.4964    0   2   4         6
                38.70         31.60        2.3266    1   0   7         6
                39.21          2.37        2.2979    2   0   5         6
                40.72          5.19        2.2157    1   2   2        12
                44.60          1.46        2.0317    2   1   4        12
                46.32          5.36        1.9600    0   0   9         2
                47.62         29.86        1.9094    0   3   3         6
                51.25          1.17        1.7825    2   0   8         6
                52.33         19.16        1.7484    2   2   0         6
                55.70          2.11        1.6501    3   1   2        12
                58.08          1.54        1.5881    1   2   8        12
                60.76         15.04        1.5243    0   2  10         6
                61.10          2.16        1.5166    3   1   5        12
                61.73          6.59        1.5027    2   2   6        12
                62.21          1.62        1.4923    0   4   2         6
                65.14          1.95        1.4321    4   0   4         6
                66.49          1.15        1.4063    0   3   9         6
                66.95          2.99        1.3977    1   3   7        12
                68.34          2.16        1.3725    2   3   2        12
                71.21          1.36        1.3241    1   0  13         6
                71.37          1.57        1.3216    4   1   0        12
                72.44          1.48        1.3047    2   2   9        12
                73.43          3.44        1.2895    4   1   3        12
                73.43          1.89        1.2895    1   4   3        12
                78.63          4.46        1.2168    3   2   7        12
                78.65          1.94        1.2165    1   3  10        12
                80.89          1.30        1.1884    0   3  12         6
                82.67          3.01        1.1673    2   1  13        12
                84.29          1.74        1.1489    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.