UN2
      Wyckoff R W G
      Crystal Structures 1 (1963) 239-444
      Second edition. Interscience Publishers, New York, New York
      Fluorite structure
      _database_code_amcsd 0011727

      CELL PARAMETERS:    5.3100   5.3100   5.3100   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    149.721
      Density (g/cm3):     11.801
      MAX. ABS. INTENSITY / VOLUME**2:      981.2192423    
      RIR:     27.074
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                29.13        100.00        3.0657    1   1   1         8
                33.76         38.31        2.6550    2   0   0         6
                48.49         41.39        1.8774    2   2   0        12
                57.57         37.78        1.6010    3   1   1        24
                60.39          8.64        1.5329    2   2   2         8
                71.00          5.45        1.3275    4   0   0         6
                78.52         13.01        1.2182    3   3   1        24
                80.97          9.74        1.1874    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.