Quartz
      Hazen R M, Finger L W, Hemley R J, Mao H K
      Solid State Communications 72 (1989) 507-511
      High-pressure crystal chemistry and amorphization of alpha-quartz
      Locality: synthetic
      Sample: P = 5.1 GPa
      _database_code_amcsd 0015464

      CELL PARAMETERS:    4.7050   4.7050   5.2500   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    100.649
      Density (g/cm3):      2.973
      MAX. ABS. INTENSITY / VOLUME**2:      32.95372673    
      RIR:      3.609
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.81         17.48        4.0746    1   0   0         6
                27.71         20.95        3.2189    0   1   1         6
                27.71         79.05        3.2189    1   0   1         6
                38.26         14.19        2.3525    1   1   0         3
                40.90         10.94        2.2067    0   1   2         6
                40.90          4.21        2.2067    1   0   2         6
                42.09          4.86        2.1468    1   1   1         6
                44.47          7.57        2.0373    2   0   0         6
                52.21          9.08        1.7519    1   1   2         6
                52.27          1.37        1.7500    0   0   3         2
                57.24          4.06        1.6095    0   2   2         6
                57.24          2.90        1.6095    2   0   2         6
                57.30          2.01        1.6080    1   0   3         6
                62.89          5.74        1.4778    1   2   1         6
                62.89          5.57        1.4778    2   1   1         6
                66.60          2.75        1.4041    1   1   3         6
                70.95          7.10        1.3283    2   1   2         6
                71.00          5.35        1.3275    0   2   3         6
                71.79          6.67        1.3149    3   0   1         6
                76.21          3.21        1.2493    0   1   4         6
                76.21          1.25        1.2493    1   0   4         6
                79.45          3.00        1.2063    0   3   2         6
                83.64          3.16        1.1561    1   2   3         6
                84.54          1.81        1.1462    1   1   4         6
                86.03          1.34        1.1301    3   1   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.