Tschermigite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050276
      Abdeen A M, Will G, Schafer W, Kirfel A, Bargouth M O, Recker K, Weiss A
      Zeitschrift fur Kristallographie 157 (1981) 147-166
      X-ray and neutron diffraction study of alums:
      II. The crystal structure of methylammonium aluminium alum
      III. The crystal structure of ammonium aluminium alum
      Note: Neutron data

      CELL PARAMETERS:   12.24800   12.24800   12.24800   90.00000   90.00000   90.00000
      SPACE GROUP: Pa3
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                12.56         49.74        7.0669    1   1   1
                14.51          6.67        6.1201    2   0   0
                16.23         57.04        5.4740    2   1   0
                17.78         31.73        4.9970    2   1   1
                20.55         96.90        4.3276    2   2   0
                21.81         71.97        4.0801    2   2   1
                24.14         36.42        3.6906    3   1   1
                26.28          1.92        3.3948    3   0   2
                27.28         28.65        3.2713    3   2   1
                27.28         71.35        3.2713    3   1   2
                29.21         33.10        3.0600    4   0   0
                30.12         16.72        2.9687    4   1   0
                30.12          3.93        2.9687    3   2   2
                31.02         16.29        2.8850    4   1   1
                31.89         33.53        2.8081    3   3   1
                32.74          4.87        2.7370    4   0   2
                32.74         17.00        2.7370    4   2   0
                33.57          1.61        2.6710    4   2   1
                33.57         12.26        2.6710    4   1   2
                34.38         13.78        2.6096    3   3   2
                35.96          2.56        2.4985    4   2   2
                37.48          5.60        2.4005    4   3   1
                38.22          7.74        2.3556    3   3   3
                38.22          2.15        2.3556    5   1   1
                39.67          3.94        2.2729    4   3   2
                39.67          1.19        2.2729    4   2   3
                40.37          5.30        2.2347    5   1   2
                42.43          7.20        2.1307    4   4   1
                43.10          3.17        2.0992    4   3   3
                43.76          9.00        2.0690    5   1   3
                44.41         10.12        2.0400    6   0   0
                45.06          7.23        2.0123    6   1   0
                45.70          3.08        1.9856    6   1   1
                45.70          7.05        1.9856    5   3   2
                46.95         15.54        1.9353    6   0   2
                46.95          3.05        1.9353    6   2   0
                47.57          1.88        1.9116    6   1   2
                48.18          1.10        1.8887    5   1   4
                48.79          4.95        1.8666    5   3   3
                49.39          1.22        1.8453    6   2   2
                49.99          3.31        1.8247    5   4   2
                49.99          1.61        1.8247    5   2   4
                50.58          4.72        1.8047    6   3   1
                52.89          2.64        1.7310    5   4   3
                53.46          7.72        1.7140    7   1   1
                54.02          4.35        1.6974    6   4   0
                54.58          1.36        1.6813    6   4   1
                56.24          2.78        1.6357    6   4   2
                56.24          3.66        1.6357    6   2   4
                56.78          5.99        1.6213    7   2   2
                57.86          2.11        1.5935    7   3   1
                57.86          1.61        1.5935    5   5   3
                59.45          1.12        1.5545    6   5   1
                61.54          1.59        1.5067    7   1   4
                62.57          3.05        1.4843    8   0   2
                62.57          2.13        1.4843    8   2   0
                63.08          1.30        1.4735    7   2   4
                64.60          3.82        1.4425    6   6   0
                65.60          1.65        1.4229    7   4   3
                66.10          2.21        1.4134    7   1   5
                68.56          1.10        1.3685    8   0   4
                69.04          3.10        1.3600    8   4   1
                70.97          1.50        1.3276    7   0   6
                71.45          1.00        1.3199    9   2   1
                72.41          1.34        1.3048    6   6   4
                77.58          1.03        1.2302    7   7   1
                79.89          2.96        1.2002    8   6   2
                88.12          1.06        1.1082    9   4   5
                88.12          1.06        1.1082    9   4   5
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.