Alpersite
      Peterson R C, Hammarstrom J M, Seal II R R
      American Mineralogist 91 (2006) 261-269
      Alpersite (Mg,Cu)SO4*7H2O, a new mineral of the melanterite group, and cuprian
      pentahydrite: Their occurrence within mine waste
      Locality: Big Mike mine, Nevada, USA
      _database_code_amcsd 0004014

      CELL PARAMETERS:   14.1660   6.5340  10.8380   90.000  105.922   90.000
      SPACE GROUP: P2_1/c    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    964.687
      Density (g/cm3):      1.887
      MAX. ABS. INTENSITY / VOLUME**2:      6.244573938    
      RIR:      1.078
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.49          6.98       13.6225    1   0   0         2
                13.00          3.52        6.8113    2   0   0         2
                15.04          2.88        5.8914    1   1   0         4
                16.01         19.69        5.5360    0   1   1         4
                16.46         10.90        5.3850   -1   0   2         2
                17.01          4.15        5.2111    0   0   2         2
                18.15        100.00        4.8864    1   1   1         4
                18.38         52.48        4.8268   -2   0   2         2
                19.55          2.81        4.5408    3   0   0         2
                19.84         19.55        4.4747    1   0   2         2
                22.12          7.66        4.0189    2   1   1         4
                22.16          1.92        4.0117   -3   0   2         2
                22.91          1.32        3.8824   -2   1   2         4
                23.46         68.42        3.7923   -3   1   1         4
                24.18         17.11        3.6801    2   0   2         2
                26.17          2.30        3.4056    4   0   0         2
                27.30         21.32        3.2670    0   2   0         2
                28.23          7.96        3.1611   -1   1   3         4
                28.63          4.53        3.1174    0   2   1         4
                28.70          4.34        3.1100   -4   1   1         4
                28.85          3.00        3.0946   -1   2   1         4
                28.88         16.57        3.0913   -2   1   3         4
                29.42          6.69        3.0358    3   0   2         2
                29.58         11.89        3.0200    4   1   0         4
                30.38         10.01        2.9418   -4   1   2         4
                32.04         10.14        2.7932   -1   2   2         4
                32.52          9.49        2.7531    3   1   2         4
                32.55          2.07        2.7505    2   2   1         4
                32.64          2.06        2.7431   -5   0   2         2
                32.82         27.17        2.7287    4   1   1         4
                33.19         13.97        2.6994   -1   0   4         2
                33.80         11.92        2.6519    3   2   0         4
                33.98         15.37        2.6386    1   2   2         4
                34.28         10.42        2.6160   -4   1   3         4
                34.42          1.34        2.6056    0   0   4         2
                34.68          5.56        2.5870   -3   0   4         2
                34.87          1.18        2.5733    2   1   3         4
                35.21          1.10        2.5486    4   0   2         2
                35.43          2.05        2.5332   -3   2   2         4
                35.49          2.32        2.5292   -5   1   2         4
                35.71          4.91        2.5147    5   1   0         4
                36.00          1.40        2.4949   -1   1   4         4
                36.27          5.61        2.4770    3   2   1         4
                36.86          7.69        2.4387    1   0   4         2
                37.11          1.40        2.4229   -1   2   3         4
                37.26          1.61        2.4134   -4   0   4         2
                37.39          6.48        2.4053   -3   1   4         4
                37.48          2.77        2.3997   -4   2   1         4
                37.80          7.13        2.3800    0   2   3         4
                38.67          2.61        2.3284   -6   0   2         2
                38.82          1.71        2.3198   -4   2   2         4
                38.91          2.60        2.3145    5   1   1         4
                39.30          1.87        2.2926   -3   2   3         4
                39.44          1.18        2.2847    1   1   4         4
                40.57          1.76        2.2239    3   2   2         4
                40.83          2.10        2.2101   -5   0   4         2
                41.16          6.43        2.1933   -6   1   2         4
                42.03          1.05        2.1497   -4   2   3         4
                42.13          1.25        2.1446    6   1   0         4
                43.32          1.95        2.0885    1   3   1         4
                44.34          2.39        2.0428   -1   1   5         4
                44.89          6.75        2.0191   -1   3   2         4
                45.12          3.50        2.0095    4   2   2         4
                45.21          2.68        2.0058   -6   0   4         2
                45.33          2.53        2.0008    6   1   1         4
                45.69          5.87        1.9858    0   1   5         4
                45.70          1.25        1.9853   -2   3   2         4
                46.00         16.19        1.9729   -3   3   1         4
                46.67          1.27        1.9461    7   0   0         2
                46.80          1.44        1.9412   -4   2   4         4
                46.82          1.26        1.9404    3   1   4         4
                47.19          1.05        1.9258   -7   1   1         4
                47.41          1.93        1.9175   -6   1   4         4
                47.98          2.60        1.8961   -6   2   2         4
                47.99          3.84        1.8956    1   1   5         4
                48.16          3.80        1.8895    3   3   1         4
                48.83          1.58        1.8651    7   1   0         4
                48.85          2.01        1.8644    6   2   0         4
                48.98          2.29        1.8596   -7   1   3         4
                49.21          2.38        1.8516   -5   1   5         4
                49.37          5.02        1.8460    2   2   4         4
                49.54          1.34        1.8401    4   0   4         2
                49.86          2.58        1.8289    5   1   3         4
                50.54          1.61        1.8060   -2   0   6         2
                50.61          1.36        1.8037   -3   3   3         4
                50.87          5.36        1.7950   -3   0   6         2
                51.86          2.67        1.7631    4   3   1         4
                52.03          3.18        1.7576    7   1   1         4
                52.13          1.30        1.7544   -4   0   6         2
                53.07          1.02        1.7255    3   2   4         4
                53.62          3.94        1.7094   -6   2   4         4
                53.84          1.83        1.7028    8   0   0         2
                54.92          2.89        1.6719    7   2   0         4
                55.11          3.05        1.6666    3   1   5         4
                55.50          1.55        1.6557    4   3   2         4
                56.26          1.65        1.6351    5   3   1         4
                56.32          2.30        1.6335    0   4   0         2
                56.94          2.59        1.6172   -7   1   5         4
                58.39          1.42        1.5806   -2   2   6         4
                59.77          1.34        1.5473   -2   4   2         4
                59.84          1.11        1.5456   -4   2   6         4
                60.32          1.70        1.5345    1   4   2         4
                60.35          4.13        1.5337    0   2   6         4
                61.39          1.98        1.5103   -9   1   3         4
                61.40          1.68        1.5100    8   2   0         4
                61.66          2.40        1.5044   -3   1   7         4
                62.79          1.15        1.4799   -7   1   6         4
                63.12          1.43        1.4728    4   4   0         4
                69.48          1.15        1.3528   -4   4   4         4
                73.62          1.42        1.2866    4   2   6         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.