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

      CELL PARAMETERS:   4.9717  4.9717  6.9223   90.000   90.000   90.000
      SPACE GROUP: P4_12_12  
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      36.05948454    
               2-THETA      INTENSITY    D-SPACING   H   K   L
                22.01        100.00        4.0381    1   0   1
                28.48          9.04        3.1345    1   1   1
                31.49         11.28        2.8406    1   0   2
                36.13         14.31        2.4859    2   0   0
                36.43          4.24        2.4664    1   1   2
                42.71          2.83        2.1169    2   1   1
                44.89          2.51        2.0191    2   0   2
                47.11          5.26        1.9290    1   1   3
                48.67          5.40        1.8707    2   1   2
                54.24          2.68        1.6912    2   0   3
                57.15          4.19        1.6117    3   0   1
                57.57          1.25        1.6011    2   1   3
                60.38          2.77        1.5331    3   1   1
                62.10          3.18        1.4947    3   0   2
                65.17          2.35        1.4314    3   1   2
                65.75          1.53        1.4203    2   0   4
                66.92          1.49        1.3983    2   2   3
                68.74          2.53        1.3657    2   1   4
                69.51          1.12        1.3523    3   2   1
                70.62          2.02        1.3337    1   0   5
                72.79          2.49        1.2993    3   1   3
                74.00          2.43        1.2810    3   2   2
                78.12          1.24        1.2234    4   0   1
                79.48          1.61        1.2058    4   1   0
                81.28          1.44        1.1837    3   2   3
                81.99          1.62        1.1752    2   1   5
                89.23          1.14        1.0976    4   2   1
                89.38          1.79        1.0962    1   1   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.