GeO2
      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, cristobalite structure
      _database_code_amcsd 0018755

      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):      4.240
      MAX. ABS. INTENSITY / VOLUME**2:      99.34511808    
      RIR:      7.629
      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          5.05        3.5164    1   1   0         4
                28.74         22.92        3.1062    1   1   1         8
                32.47         27.75        2.7575    1   0   2         8
                36.12         18.59        2.4865    2   0   0         4
                37.29         10.52        2.4116    1   1   2         8
                38.68          9.29        2.3280    2   0   1         8
                40.56          9.35        2.2240    2   1   0         8
                42.89         12.38        2.1084    2   1   1         8
                44.90          6.30        2.0188    1   0   3         8
                48.68          7.04        1.8705    1   1   3         8
                49.35          5.59        1.8466    2   1   2         8
                52.01          1.63        1.7582    2   2   0         4
                53.95          1.24        1.6994    2   2   1         8
                55.46          5.25        1.6567    0   0   4         2
                55.66          5.78        1.6514    2   0   3         8
                58.71          3.56        1.5726    3   1   0         8
                58.93          2.63        1.5673    2   1   3         8
                59.52          4.33        1.5531    2   2   2         8
                60.51          9.30        1.5301    3   1   1         8
                62.67         14.05        1.4825    3   0   2         8
                67.99          3.26        1.3787    2   0   4         8
                68.17          1.60        1.3757    2   2   3         8
                69.63          4.93        1.3503    3   2   1         8
                70.94          5.14        1.3286    2   1   4         8
                73.99          6.54        1.2811    3   1   3         8
                74.02          3.62        1.2807    1   0   5         8
                74.52          5.22        1.2734    3   2   2         8
                78.23          1.71        1.2219    4   0   1         8
                79.46          1.80        1.2061    4   1   0         8
                81.03          2.24        1.1866    4   1   1         8
                82.25          2.52        1.1721    3   3   0         4
                82.44          2.30        1.1699    3   2   3         8
                85.05          1.97        1.1406    3   1   4         8
                85.24          2.05        1.1385    2   1   5         8
                89.33          1.31        1.0967    4   2   1         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.