Portlandite
      Nagai T, Ito T, Hattori T, Yamanaka T
      Physics and Chemistry of Minerals 27 (2000) 462-466
      Compression mechanism and amorphization of portlandite,
      Ca(OH)2: structural refinement under pressure
      Sample: P = 0.5 GPa
      _database_code_amcsd 0008414

      CELL PARAMETERS:    3.5682   3.5682   4.8625   90.000   90.000  120.000
      SPACE GROUP: P-3m1     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     53.615
      Density (g/cm3):      2.232
      MAX. ABS. INTENSITY / VOLUME**2:      23.66034604    
      RIR:      3.452
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.24         78.79        4.8625    0   0   1         2
                28.89         21.63        3.0902    1   0   0         6
                34.39          3.15        2.6081    1   0   1         6
                34.39         96.85        2.6081    0   1   1         6
                47.59         19.49        1.9108    1   0   2         6
                47.59         28.59        1.9108    0   1   2         6
                51.20         29.09        1.7841    1   1   0         6
                54.81         18.71        1.6749    1   1   1        12
                56.80          1.52        1.6208    0   0   3         2
                59.86          2.80        1.5451    2   0   0         6
                63.14         11.11        1.4725    2   0   1         6
                64.82          1.50        1.4384    1   1   2        12
                64.97          1.60        1.4354    0   1   3         6
                64.97         11.40        1.4354    1   0   3         6
                72.48          5.92        1.3040    2   0   2         6
                72.48          4.26        1.3040    0   2   2         6
                78.72          1.78        1.2156    0   0   4         2
                79.97          3.12        1.1997    1   1   3        12
                85.50          2.56        1.1357    1   2   1        12
                85.92          1.69        1.1312    1   0   4         6
                87.15          4.11        1.1184    0   2   3         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.