Gadolinium
      Spedding F H, Daane A H, Herrmann K W
      Acta Crystallographica 9 (1956) 559-563
      The crystal structures and lattice parameters of high-purity scandium,
      yttrium and the rare earth metals
      Locality: synthetic
      Note: sample 99.7% pure
      _database_code_amcsd 0009173

      CELL PARAMETERS:    3.6360   3.6360   5.7826   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     66.207
      Density (g/cm3):      7.887
      MAX. ABS. INTENSITY / VOLUME**2:      496.2513760    
      RIR:     20.488
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.34         23.94        3.1489    1   0   0         6
                30.93         25.22        2.8913    0   0   2         2
                32.37        100.00        2.7654    1   0   1        12
                42.44         14.93        2.1297    1   0   2        12
                50.18         17.24        1.8180    1   1   0         6
                55.93         17.73        1.6440    1   0   3        12
                58.63          2.50        1.5744    2   0   0         6
                60.12         18.25        1.5390    1   1   2        12
                60.99         12.99        1.5191    2   0   1        12
                64.45          2.36        1.4456    0   0   4         2
                67.77          2.95        1.3827    2   0   2        12
                71.86          2.39        1.3138    1   0   4        12
                78.43          5.28        1.2194    2   0   3        12
                82.80          2.95        1.1657    2   1   1        24
                85.89          5.27        1.1315    1   1   4        12
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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.