Vermiculite
      Gruner J W
      American Mineralogist 19 (1934) 557-575
      The structures of vermiculites and their collapse by dehydration
      Locality: Structure results from data of many samples
      _database_code_amcsd 0000012

      CELL PARAMETERS:    5.3100   9.2000  28.4600   90.000   97.140   90.000
      SPACE GROUP: Cc        
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1379.546
      Density (g/cm3):      1.816
      MAX. ABS. INTENSITY / VOLUME**2:      120.7170254    
      RIR:     21.644
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.26        100.00       14.1197    0   0   2         1
                12.54          1.13        7.0598    0   0   4         1
                19.33          1.82        4.5922   -1   1   1         2
                21.50          1.30        4.1329    0   2   3         2
                22.52          1.19        3.9487    1   1   3         2
                25.23          1.27        3.5299    0   0   8         1
                31.69          1.10        2.8239    0   0  10         1
                35.42          2.06        2.5340   -1   3   4         2
                35.43          1.01        2.5336    2   0   2         1
                37.90          2.06        2.3737   -1   3   6         2
                37.91          1.00        2.3734    2   0   4         1
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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.