Shigaite
      Cooper M A, Hawthorne F C
      The Canadian Mineralogist 34 (1996) 91-97
      The crystal structure of shigaite, [AlMn2(OH)6]3(SO4)2Na(H2O)6{H2O}6, a
      hydrotalcite-group mineral
      _database_code_amcsd 0005480

      CELL PARAMETERS:    9.5120   9.5120  33.0740   90.000   90.000  120.000
      SPACE GROUP: R-3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   2591.559
      Density (g/cm3):      2.206
      MAX. ABS. INTENSITY / VOLUME**2:      31.38827219    
      RIR:      4.632
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 8.02        100.00       11.0247    0   0   3         2
                12.00          3.08        7.3735    0   1   2         6
                15.18          1.41        5.8358    1   0   4         6
                16.08         28.82        5.5123    0   0   6         2
                17.19          2.30        5.1577    0   1   5         6
                18.66          2.73        4.7560    1   1   0         6
                20.34          6.24        4.3670    2  -1   3         6
                20.34          4.96        4.3670    1   1   3         6
                21.68          1.52        4.0985    1   0   7         6
                22.24          1.54        3.9967    2   0   2         6
                24.22         21.55        3.6749    0   0   9         2
                25.48          1.42        3.4964    2   0   5         6
                29.19          4.03        3.0598   -1   3   2         6
                30.75          1.35        2.9079    1   1   9         6
                31.76          1.36        2.8171   -1   3   5         6
                32.61          7.36        2.7459    3   0   0         6
                33.64         12.49        2.6645    0   3   3         6
                34.50          2.36        2.5998    2   1   7         6
                36.56         16.90        2.4578    0   3   6         6
                36.56          4.14        2.4578    3   0   6         6
                38.74          2.57        2.3245    2   2   3         6
                41.03         13.13        2.1997    0   3   9         6
                46.70         12.02        1.9453    0   3  12         6
                46.70          2.05        1.9453    3   0  12         6
                49.61          1.07        1.8374    0   0  18         2
                51.51          1.37        1.7742    5  -1   3         6
                51.51          1.71        1.7742    4   1   3         6
                53.28          3.71        1.7192    0   3  15         6
                53.28          4.56        1.7192    3   0  15         6
                58.19          4.93        1.5853    3   3   0         6
                58.85          3.06        1.5692    6  -3   3         6
                58.85          2.38        1.5692    3   3   3         6
                60.64          1.84        1.5271    0   3  18         6
                60.64          2.55        1.5271    3   0  18         6
                60.79          2.46        1.5236    6  -3   6         6
                60.79          3.01        1.5236    3   3   6         6
                68.32          1.07        1.3729    6   0   0         6
                68.71          1.71        1.3662    3   0  21         6
                70.71          1.78        1.3322    6   0   6         6
                73.66          1.52        1.2861    6   0   9         6
                77.50          1.98        1.2317    3   0  24         6
                82.82          1.03        1.1655    6   0  15         6
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.