Quartz
      Glinnemann J, King H E, Schulz H, Hahn T, La Placa S J, Dacol F
      Zeitschrift fur Kristallographie 198 (1992) 177-212
      Crystal structures of the low-temperature quartz-type phases of SiO2 and GeO2 at elevated pressure
      P = 4.0 GPa
      _database_code_amcsd 0011008

      CELL PARAMETERS:    4.7750   4.7750   5.3046   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    104.744
      Density (g/cm3):      2.857
      MAX. ABS. INTENSITY / VOLUME**2:      33.76514417    
      RIR:      3.848
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.49         20.98        4.1353    1   0   0         6
                27.35         77.32        3.2614    1   0   1         6
                27.35         22.68        3.2614    0   1   1         6
                37.68         10.84        2.3875    1   1   0         3
                40.40          2.99        2.2326    1   0   2         6
                40.40          9.30        2.2326    0   1   2         6
                41.48          5.25        2.1771    1   1   1         6
                43.78          7.69        2.0676    2   0   0         6
                47.18          1.19        1.9265    0   2   1         6
                51.50          9.50        1.7745    1   1   2         6
                51.70          1.10        1.7682    0   0   3         2
                56.43          2.76        1.6307    0   2   2         6
                56.43          3.49        1.6307    2   0   2         6
                56.61          2.10        1.6258    1   0   3         6
                61.89          5.34        1.4993    2   1   1         6
                61.89          5.52        1.4993    1   2   1         6
                65.71          2.61        1.4209    1   1   3         6
                69.85          6.55        1.3466    2   1   2         6
                70.01          5.38        1.3438    0   2   3         6
                70.01          1.07        1.3438    2   0   3         6
                70.60          6.78        1.3341    3   0   1         6
                75.25          2.92        1.2628    0   1   4         6
                75.25          1.16        1.2628    1   0   4         6
                78.14          3.05        1.2231    0   3   2         6
                82.34          3.37        1.1711    1   2   3         6
                83.36          2.18        1.1593    1   1   4         6
                84.47          1.35        1.1469    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.