Cristobalite
      Peacor D R
      Zeitschrift fur Kristallographie 138 (1973) 274-298
      High-temperature single-crystal study of the cristobalite inversion
      Sample: T = 221 C
      Locality: Ellora Caves, Hyderabad State, India
      _database_code_amcsd 0010754

      CELL PARAMETERS:    7.1660   7.1660   7.1660   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    367.985
      Density (g/cm3):      2.169
      MAX. ABS. INTENSITY / VOLUME**2:      40.69010729    
      RIR:      6.109
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.48        100.00        4.1373    1   1   1         8
                35.43         19.18        2.5336    2   2   0        12
                41.81          1.35        2.1606    3   1   1        24
                43.76          4.64        2.0686    2   2   2         8
                55.93          7.56        1.6440    3   3   1        24
                63.61          3.93        1.4628    4   2   2        24
                74.97          2.02        1.2668    4   4   0        12
                79.06          2.52        1.2113    5   3   1        48
                85.75          1.04        1.1330    6   2   0        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.