YbO
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      rocksalt structure
      _database_code_amcsd 0011450

      CELL PARAMETERS:    4.8600   4.8600   4.8600   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    114.791
      Density (g/cm3):     10.937
      MAX. ABS. INTENSITY / VOLUME**2:      627.1760362    
      RIR:     18.672
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.89        100.00        2.8059    1   1   1         8
                36.99         73.30        2.4300    2   0   0         6
                53.32         44.92        1.7183    2   2   0        12
                63.48         35.18        1.4653    3   1   1        24
                66.66         13.31        1.4030    2   2   2         8
                78.77          5.48        1.2150    4   0   0         6
                87.49         11.98        1.1150    3   3   1        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.