Cristobalite
      Gibbs G V, Boisen M B, Downs R T, Lasaga A C
      Materials Research Society Symposia Proceedings 121 (1988) 155-165
      Mathematical Modeling of the structures and bulk moduli of TX2 quartz
      and cristobalite structure types, T = C, Si, Ge and X = O, S
      Locality: theoretical
      _database_code_amcsd 0018754

      CELL PARAMETERS:    4.9730   4.9730   6.6270   90.000   90.000   90.000
      SPACE GROUP: P4_12_12  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    163.891
      Density (g/cm3):      2.435
      MAX. ABS. INTENSITY / VOLUME**2:      32.35105258    
      RIR:      4.326
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                22.35        100.00        3.9776    1   0   1         8
                25.33          1.78        3.5164    1   1   0         4
                28.74         13.74        3.1062    1   1   1         8
                32.47         17.68        2.7575    1   0   2         8
                36.12         18.77        2.4865    2   0   0         4
                37.29          1.59        2.4116    1   1   2         8
                42.89          4.16        2.1084    2   1   1         8
                45.61          1.43        1.9888    2   0   2         8
                48.68          6.92        1.8705    1   1   3         8
                49.35          6.66        1.8466    2   1   2         8
                55.46          1.91        1.6567    0   0   4         2
                55.66          3.29        1.6514    2   0   3         8
                57.29          3.79        1.6081    3   0   1         8
                58.71          1.19        1.5726    3   1   0         8
                60.51          4.52        1.5301    3   1   1         8
                62.67          6.49        1.4825    3   0   2         8
                65.73          1.07        1.4207    3   1   2         8
                67.99          1.86        1.3787    2   0   4         8
                68.17          1.45        1.3757    2   2   3         8
                69.63          1.84        1.3503    3   2   1         8
                70.94          2.50        1.3286    2   1   4         8
                73.99          4.50        1.2811    3   1   3         8
                74.02          2.97        1.2807    1   0   5         8
                74.52          3.92        1.2734    3   2   2         8
                78.23          1.31        1.2219    4   0   1         8
                79.46          1.44        1.2061    4   1   0         8
                81.03          1.21        1.1866    4   1   1         8
                82.44          1.17        1.1699    3   2   3         8
                85.05          1.29        1.1406    3   1   4         8
                85.24          1.73        1.1385    2   1   5         8
                89.33          1.11        1.0967    4   2   1         8
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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.