CaAl2(OH)8(H2O)2*1.84H2O
      Guirado F, Gali S, Chinchon S, Rius J
      Angewandte Chemie 37 (1998) 72-75
      Crystal structure solution of hydrated high-alumina cement
      from X-ray powder diffraction data
      _database_code_amcsd 0017822

      CELL PARAMETERS:   16.3870  16.3870   8.2790   90.000   90.000  120.000
      SPACE GROUP: P6_3/m    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1925.340
      Density (g/cm3):      1.550
      MAX. ABS. INTENSITY / VOLUME**2:      45.04265534    
      RIR:      9.464
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.23        100.00       14.1916    1   0   0         6
                12.38         18.45        7.1511    1   0   1        12
                12.47          5.71        7.0958    2   0   0         6
                16.53          1.09        5.3639    2   1   0         6
                18.76          2.30        4.7305    3   0   0         6
                19.72          1.43        4.5017    1   2   1        12
                21.47          1.35        4.1395    0   0   2         2
                24.09          1.35        3.6947    1   1   2        12
                25.05          1.93        3.5547    1   3   1        12
                27.39          1.04        3.2558    3   2   0         6
                31.36          1.16        2.8524    1   3   2        12
                35.07          1.28        2.5591    2   3   2        12
                36.23          1.04        2.4797    4   1   2        12
                38.04          1.03        2.3653    6   0   0         6
                38.46          1.03        2.3409    5   0   2        12
                39.90          1.06        2.2596    3   1   3        12
                41.45          1.12        2.1783    4   0   3        12
                42.96          1.51        2.1052    3   2   3        12
                46.80          1.04        1.9412    3   3   3        12
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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.