HfO2
      Wyckoff R W G
      Crystal Structures 1 (1963) 239-444
      Second edition. Interscience Publishers, New York, New York
      Fluorite structure
      _database_code_amcsd 0011694

      CELL PARAMETERS:    5.1150   5.1150   5.1150   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    133.825
      Density (g/cm3):     10.446
      MAX. ABS. INTENSITY / VOLUME**2:      689.6426720    
      RIR:     21.497
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                30.26        100.00        2.9531    1   1   1         8
                35.09         32.76        2.5575    2   0   0         6
                50.47         44.42        1.8084    2   2   0        12
                59.98         36.10        1.5422    3   1   1        24
                62.95          7.35        1.4766    2   2   2         8
                74.15          5.49        1.2787    4   0   0         6
                82.14         12.04        1.1735    3   3   1        24
                84.76          8.24        1.1437    4   2   0        24
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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.