Tetrawickmanite
      Lafuente B, Yang H, Downs R T
      Acta Crystallographica E71 (2015) 234-237
      Crystal structure of tetrawickmanite, Mn2+Sn4+(OH)6
      Locality: Langban, Sweden
      _database_code_amcsd 0020227

      CELL PARAMETERS:    7.8655   7.8655   7.7938   90.000   90.000   90.000
      SPACE GROUP: P4_2/n    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    482.172
      Density (g/cm3):      3.797
      MAX. ABS. INTENSITY / VOLUME**2:      62.51133248    
      RIR:      5.360
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.61         37.54        4.5272    1   1   1         8
                22.61        100.00        3.9327    2   0   0         4
                22.82         45.36        3.8969    0   0   2         2
                32.19         22.84        2.7809    2   2   0         4
                32.34         51.27        2.7681    2   0   2         8
                36.15          3.96        2.4850    3   0   1         8
                36.42          3.59        2.4669    1   0   3         8
                37.97         14.33        2.3695    1   3   1         8
                38.24          5.09        2.3538    1   1   3         8
                39.82         28.10        2.2636    2   2   2         8
                43.06          1.15        2.1008    2   3   1         8
                43.30          1.08        2.0898    2   1   3         8
                46.16         15.61        1.9664    4   0   0         4
                46.61          6.77        1.9484    0   0   4         2
                50.61          2.35        1.8036    3   3   1         8
                50.82          2.29        1.7966    3   1   3         8
                50.82          2.82        1.7966    1   3   3         8
                51.99          9.41        1.7588    4   2   0         4
                51.99         10.60        1.7588    2   4   0         4
                52.10         20.96        1.7555    4   0   2         8
                52.41         20.08        1.7459    2   0   4         8
                57.49         13.29        1.6031    4   2   2         8
                57.49         15.43        1.6031    2   4   2         8
                57.78         15.22        1.5957    2   2   4         8
                61.26          1.25        1.5132    5   1   1         8
                61.26          2.15        1.5132    1   5   1         8
                61.44          1.44        1.5091    3   3   3         8
                61.81          1.61        1.5009    1   1   5         8
                67.34          3.47        1.3904    4   4   0         4
                67.70          5.65        1.3841    4   0   4         8
                70.90          2.34        1.3292    5   3   1         8
                71.07          1.02        1.3264    5   1   3         8
                71.07          1.01        1.3264    1   5   3         8
                71.42          1.76        1.3208    3   1   5         8
                72.04          1.15        1.3109    6   0   0         4
                72.13          5.19        1.3096    4   4   2         8
                72.38          5.12        1.3056    4   2   4         8
                72.38          4.54        1.3056    2   4   4         8
                76.62          1.78        1.2436    2   6   0         4
                76.62          2.22        1.2436    6   2   0         4
                76.70          4.59        1.2425    6   0   2         8
                77.37          4.09        1.2334    2   0   6         8
                81.19          4.38        1.1848    6   2   2         8
                81.19          4.56        1.1848    2   6   2         8
                81.85          4.66        1.1769    2   2   6         8
                85.87          3.29        1.1318    4   4   4         8
                89.95          1.11        1.0907    4   6   0         4
                89.95          1.57        1.0907    6   4   0         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.