Quartz
      Wyckoff R
      Zeitschrift fur Kristallographie 63 (1926) 507-537
      Kriterien fur hexagonale Raumgruppen und die Kristallstruktur von beta Quarz.
      _cod_database_code 1011200
      _database_code_amcsd 0018071

      CELL PARAMETERS:    5.0130   5.0130   5.4700   90.000   90.000  120.000
      SPACE GROUP: P6_222    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    119.046
      Density (g/cm3):      2.514
      MAX. ABS. INTENSITY / VOLUME**2:      38.82437999    
      RIR:      5.029
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.46         11.96        4.3414    1   0   0         6
                26.21        100.00        3.4005    1   0   1        12
                35.83          5.72        2.5065    1   1   0         6
                38.92          1.62        2.3141    1   0   2        12
                41.61          2.73        2.1707    2   0   0         6
                44.93          2.11        2.0176    2   0   1        12
                49.31         20.05        1.8479    1   1   2        12
                58.75          9.20        1.5717    2   1   1        12
                64.38          1.25        1.4471    3   0   0         6
                66.44          3.04        1.4071    2   1   2        12
                67.03          8.56        1.3962    2   0   3        12
                74.13          3.28        1.2791    3   0   2        12
                75.92          1.11        1.2533    2   2   0         6
                78.40          2.97        1.2197    2   1   3        12
                79.91          3.38        1.2005    1   1   4        12
                81.93          1.55        1.1759    3   1   1        12
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.