Bicchulite
      Sahl K, Chatterjee N D
      Zeitschrift fur Kristallographie 146 (1977) 35-41
      The crystal structure of bicchulite, Ca2[Al2SiO6](OH)2
      Locality: synthetic
      _database_code_amcsd 0010796

      CELL PARAMETERS:    8.8250   8.8250   8.8250   90.000   90.000   90.000
      SPACE GROUP: I-43m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    687.296
      Density (g/cm3):      2.804
      MAX. ABS. INTENSITY / VOLUME**2:      15.75953571    
      RIR:      1.830
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.12          1.41        4.4125    2   0   0         6
                24.71         96.86        3.6028    2   1   1        12
                28.61          9.76        3.1201    2   2   0        12
                32.07        100.00        2.7907    3   1   0        24
                35.23         25.41        2.5476    2   2   2         4
                38.16         24.22        2.3586    3   2   1        24
                40.90         11.62        2.2062    4   0   0         6
                43.51         21.49        2.0801    3   3   0        12
                43.51         32.64        2.0801    4   1   1        12
                45.99          7.28        1.9733    4   2   0        24
                48.38          3.08        1.8815    3   3   2        12
                50.68          7.77        1.8014    4   2   2        12
                52.90          5.48        1.7307    5   1   0        24
                52.90          8.85        1.7307    4   3   1        24
                57.17          7.80        1.6112    5   2   1        24
                59.23         43.08        1.5601    4   4   0        12
                61.24         22.72        1.5135    4   3   3        12
                63.22          3.30        1.4708    6   0   0         6
                63.22          2.66        1.4708    4   4   2        12
                65.16          6.13        1.4316    5   3   2        24
                65.16          3.04        1.4316    6   1   1        12
                67.08          1.19        1.3954    6   2   0        24
                68.96          5.69        1.3617    5   4   1        24
                70.82          9.78        1.3304    6   2   2        12
                72.67          2.60        1.3012    6   3   1        24
                76.30          4.60        1.2480    5   4   3        24
                79.87          2.41        1.2009    6   3   3        12
                79.87          1.09        1.2009    5   5   2        12
                79.87          1.28        1.2009    7   2   1        24
                81.64          3.27        1.1793    6   4   2        24
                83.41         14.20        1.1588    7   3   0        24
                86.92          3.47        1.1208    6   5   1        24
                86.92          2.42        1.1208    7   3   2        24
                88.67          3.19        1.1031    8   0   0         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.