Amarantite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern R050153
      Susse P
      Zeitschrift fur Kristallographie 127 (1968) 261-275
      The crystal structure of amarantite, Fe2(SO4)2O*7H2O
      Locality: Quetena, Chile

      CELL PARAMETERS:   8.944695   11.66267   6.670046   95.88295   90.49232   97.24936
      SPACE GROUP: P-1
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 7.74         65.48       11.5062    0   1   0
                10.03        100.00        8.8711    1   0   0
                11.85          3.25        7.5043   -1   1   0
                13.40          4.40        6.6333    0   0   1
                13.41          3.10        6.6280    1   1   0
                15.45          2.19        5.7531    0   2   0
                16.16          2.79        5.5035    0   1   1
                16.91         10.96        5.2577    1   0   1
                17.32          2.25        5.1357   -1   2   0
                17.45         10.99        5.0972    1  -1   1
                18.33          1.29        4.8519   -1   1   1
                19.48          1.97        4.5679    1   2   0
                19.69          2.67        4.5190    1   1   1
                21.05          1.88        4.2292    1  -2   1
                22.78          1.26        3.9112   -1   2   1
                23.24          2.96        3.8354    0   3   0
                23.76          3.69        3.7522   -2   2   0
                23.93          6.99        3.7249   -2   0   1
                24.12          1.39        3.6967   -1   3   0
                24.39         11.69        3.6552    2  -1   1
                24.43         11.98        3.6506    2   0   1
                25.53          2.66        3.4944   -2  -1   1
                25.63          4.82        3.4816    0  -3   1
                27.93          1.57        3.1985   -2   2   1
                28.10         12.29        3.1796    0   3   1
                28.57          3.99        3.1291   -1   0   2
                28.54          8.05        3.1315   -1  -3   1
                28.74         14.10        3.1103   -1   3   1
                28.98          1.04        3.0846    1   0   2
                29.21          6.18        3.0612   -1  -1   2
                29.69          1.89        3.0127    0  -2   2
                30.26          1.13        2.9570    3   0   0
                30.99          1.02        2.8893    2  -3   1
                31.11          1.33        2.8779    2   2   1
                32.26          1.21        2.7782   -3   2   0
                32.65          2.29        2.7458    0  -4   1
                32.80          2.07        2.7336    2   3   0
                33.15          1.05        2.7054    3  -1   1
                33.48          5.19        2.6792    3   0   1
                33.41          6.66        2.6844   -2   0   2
                34.28          1.59        2.6184   -2  -1   2
                34.39          1.62        2.6101   -2   1   2
                34.40          2.01        2.6094   -2  -3   1
                34.44          1.32        2.6065   -3  -1   1
                34.98          2.69        2.5678   -2   4   0
                35.33          3.25        2.5432   -1  -4   1
                36.27          2.19        2.4789    2   1   2
                38.35          2.47        2.3489    2  -3   2
                40.81          2.67        2.2125    3  -1   2
                41.92          1.04        2.1565   -1   0   3
                42.76          1.05        2.1159   -4   1   1
                43.93          1.06        2.0624   -3  -2   2
                44.80          1.95        2.0240    2   3   2
                45.33          2.19        2.0018   -2   5   1
                47.43          1.66        1.9177    0   6   0
                49.28          3.58        1.8499    4  -1   2
                49.87          1.18        1.8292    4  -4   1
                50.09          1.34        1.8217    4   3   0
                52.46          1.42        1.7447   -2   3   3
                55.03          1.21        1.6691   -2  -4   3
                55.95          1.27        1.6437    0   7   0
                57.72          1.20        1.5975   -1   6   2
                60.76          1.27        1.5245   -3  -4   3
                60.76          1.27        1.5245   -3  -4   3
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.