ErH2
      Wyckoff R W G
      Crystal Structures 1 (1963) 239-444
      Second edition. Interscience Publishers, New York, New York
      Fluorite structure
      _database_code_amcsd 0011690

      CELL PARAMETERS:    5.1230   5.1230   5.1230   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    134.454
      Density (g/cm3):      8.361
      MAX. ABS. INTENSITY / VOLUME**2:      608.2318601    
      RIR:     23.687
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                30.22        100.00        2.9578    1   1   1         8
                35.03         48.12        2.5615    2   0   0         6
                50.38         32.98        1.8113    2   2   0        12
                59.88         35.19        1.5446    3   1   1        24
                62.84          9.68        1.4789    2   2   2         8
                74.02          4.15        1.2808    4   0   0         6
                81.98         11.57        1.1753    3   3   1        24
                84.59         10.37        1.1455    4   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.