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 = 10.2 GPa
      _database_code_amcsd 0011010

      CELL PARAMETERS:    4.6040   4.6040   5.2070   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     95.585
      Density (g/cm3):      3.131
      MAX. ABS. INTENSITY / VOLUME**2:      32.02765152    
      RIR:      3.331
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                22.30         19.94        3.9872    1   0   0         6
                28.19         17.11        3.1657    0   1   1         6
                28.19         82.89        3.1657    1   0   1         6
                39.13         16.54        2.3020    1   1   0         3
                41.42         12.46        2.1799    0   1   2         6
                41.42          6.08        2.1799    1   0   2         6
                42.96          6.09        2.1054    1   1   1         6
                45.50          9.63        1.9936    2   0   0         6
                48.92          1.10        1.8618    2   0   1         6
                52.74          2.19        1.7357    0   0   3         2
                53.11          7.27        1.7246    1   1   2         6
                57.95          2.14        1.5914    1   0   3         6
                58.29          5.82        1.5828    0   2   2         6
                58.29          3.49        1.5828    2   0   2         6
                64.36          6.50        1.4476    1   2   1         6
                64.36          5.17        1.4476    2   1   1         6
                67.60          3.25        1.3859    1   1   3         6
                72.16          5.08        1.3091    0   2   3         6
                72.47          8.96        1.3043    2   1   2         6
                73.55          8.05        1.2878    3   0   1         6
                77.07          1.89        1.2375    1   0   4         6
                77.07          3.94        1.2375    0   1   4         6
                81.27          3.75        1.1837    0   3   2         6
                85.29          3.85        1.1379    1   2   3         6
                85.74          1.84        1.1331    1   1   4         6
                88.39          1.49        1.1058    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.