Cristobalite
      Downs R T, Palmer D C
      American Mineralogist 79 (1994) 9-14
      The pressure behavior of alpha cristobalite
      P = 0.19 GPa

      CELL PARAMETERS:   4.9501  4.9501  6.8760   90.000   90.000   90.000
      SPACE GROUP: P4_12_12  
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      35.57209648    
               2-THETA      INTENSITY    D-SPACING   H   K   L
                22.13        100.00        4.0173    1   0   1
                28.62         10.02        3.1193    1   1   1
                31.69         12.55        2.8238    1   0   2
                36.30         15.08        2.4750    2   0   0
                36.64          3.49        2.4527    1   1   2
                42.92          2.98        2.1072    2   1   1
                45.14          2.28        2.0087    2   0   2
                47.41          5.72        1.9175    1   1   3
                48.94          5.76        1.8613    2   1   2
                53.29          1.07        1.7190    0   0   4
                54.57          2.79        1.6817    2   0   3
                57.43          4.17        1.6045    3   0   1
                60.67          3.07        1.5263    3   1   1
                62.43          3.66        1.4876    3   0   2
                65.52          2.06        1.4246    3   1   2
                66.19          1.55        1.4119    2   0   4
                67.31          1.50        1.3910    2   2   3
                69.19          2.54        1.3577    2   1   4
                69.86          1.20        1.3463    3   2   1
                71.16          2.25        1.3250    1   0   5
                73.22          2.85        1.2927    3   1   3
                74.41          2.68        1.2750    3   2   2
                78.54          1.23        1.2180    4   0   1
                79.90          1.56        1.2006    4   1   0
                81.77          1.38        1.1778    3   2   3
                82.59          1.63        1.1682    2   1   5
                83.53          1.01        1.1574    3   1   4
                89.73          1.12        1.0928    4   2   1
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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.