Gunningite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern R070571.
      Wildner M, Giester G
      Neues Jahrbuch fur Mineralogie, Monatshefte 1991 (1991) 296-306
      The crystal structures of kieserite-type compounds.
      I. Crystal structures of Me(II)SO4*H2O (Me = Mn,Fe,Co,Ni,Zn)
      Locality: synthetic

      CELL PARAMETERS:   6.962866   7.597943   7.682212   90.00000   118.2582   90.00000
      SPACE GROUP: C2/c
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.38         27.82        4.8263   -1   1   1
                18.59         57.17        4.7723    1   1   0
                23.41         14.59        3.7990    0   2   0
                26.06        100.00        3.4172   -1   1   2
                26.51         17.46        3.3602    1   1   1
                26.90         26.87        3.3126    0   2   1
                29.11         47.04        3.0665    2   0   0
                34.94         13.09        2.5663   -2   2   1
                35.51         47.06        2.5266    0   2   2
                37.24          4.78        2.4131   -2   2   2
                37.68          3.23        2.3862    2   2   0
                37.82          6.78        2.3776    1   1   2
                38.43         14.85        2.3409    1   3   0
                41.05         20.25        2.1977   -3   1   2
                42.79          9.97        2.1119   -1   3   2
                43.08          3.29        2.0982    1   3   1
                43.89          8.71        2.0616   -2   2   3
                44.65          1.06        2.0282    2   2   1
                45.94         14.32        1.9741    3   1   0
                46.81          1.68        1.9395    0   2   3
                47.50          6.64        1.9130   -2   0   4
                47.86          4.25        1.8995    0   4   0
                50.10          9.28        1.8194   -1   1   4
                51.28          2.23        1.7804    1   3   2
                52.55          2.79        1.7403   -4   0   2
                52.73          1.60        1.7349   -3   1   4
                53.60          6.43        1.7086   -2   2   4
                53.86          2.24        1.7010   -3   3   2
                54.18          2.80        1.6917    0   0   4
                54.59         15.32        1.6801    2   2   2
                55.44          9.40        1.6563    0   4   2
                56.67         10.89        1.6231   -2   4   2
                56.99          1.10        1.6148    2   4   0
                57.22          1.31        1.6088   -3   3   3
                57.93          9.57        1.5908    3   3   0
                58.28          4.71        1.5822   -4   2   2
                59.09          7.22        1.5622   -4   0   4
                59.70          1.46        1.5478   -4   2   3
                59.80          2.23        1.5454    0   2   4
                60.32          2.32        1.5333    4   0   0
                61.51          8.03        1.5064   -1   3   4
                62.97          2.91        1.4750    1   5   0
                63.82          3.41        1.4574   -3   3   4
                64.04          1.35        1.4529    0   4   3
                64.44          2.62        1.4448   -4   2   4
                64.58          3.93        1.4421    3   1   2
                64.86          1.67        1.4365    1   1   4
                65.62          2.30        1.4218    4   2   0
                66.12          3.51        1.4123   -1   5   2
                69.04          1.45        1.3594   -5   1   2
                70.56          3.04        1.3338    2   4   2
                71.49          1.39        1.3187   -5   1   4
                72.75          1.36        1.2990    1   5   2
                73.79          5.39        1.2832   -4   4   2
                74.65          1.10        1.2706    3   3   2
                74.94          1.09        1.2663    0   6   0
                74.88          2.61        1.2672   -3   5   2
                74.91          2.45        1.2667    1   3   4
                75.54          1.10        1.2578   -3   1   6
                75.97          2.95        1.2517    2   0   4
                79.44          2.58        1.2055   -2   2   6
                79.79          1.45        1.2010   -1   1   6
                81.20          1.70        1.1837   -5   3   4
                82.32          2.17        1.1705    2   6   0
                82.55          2.12        1.1678   -4   2   6
                86.00          1.76        1.1296   -5   1   6
                88.50          1.41        1.1040    5   3   0
                88.50          1.41        1.1040    5   3   0
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.