Gadolinium
      Wyckoff R W G
      Crystal Structures 1 (1963) 7-83
      Second edition. Interscience Publishers, New York, New York
      Sample at T = 106 K
      Hexagonal closest packed, hcp, structure
      _database_code_amcsd 0011175

      CELL PARAMETERS:    3.6290   3.6290   5.7960   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     66.105
      Density (g/cm3):      7.899
      MAX. ABS. INTENSITY / VOLUME**2:      496.4112716    
      RIR:     20.463
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.40         23.88        3.1428    1   0   0         6
                30.85         25.45        2.8980    0   0   2         2
                32.41        100.00        2.7628    1   0   1        12
                42.43         14.99        2.1305    1   0   2        12
                50.28         17.17        1.8145    1   1   0         6
                55.86         17.86        1.6459    1   0   3        12
                58.76          2.48        1.5714    2   0   0         6
                60.17         18.25        1.5379    1   1   2        12
                61.10         12.94        1.5167    2   0   1        12
                64.29          2.39        1.4490    0   0   4         2
                67.85          2.95        1.3814    2   0   2        12
                71.73          2.41        1.3159    1   0   4        12
                78.45          5.29        1.2191    2   0   3        12
                82.98          2.94        1.1637    2   1   1        24
                85.82          5.30        1.1323    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.