Praseodymium
      Wyckoff R W G
      Crystal Structures 1 (1963) 7-83
      Second edition. Interscience Publishers, New York, New York
      Hexagonal closest packed, hcp, structure
      _database_code_amcsd 0011189

      CELL PARAMETERS:    3.6690   3.6690   5.9200   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     69.016
      Density (g/cm3):      6.780
      MAX. ABS. INTENSITY / VOLUME**2:      389.8685680    
      RIR:     18.725
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.08         23.78        3.1774    1   0   0         6
                30.19         26.05        2.9600    0   0   2         2
                31.97        100.00        2.7997    1   0   1        12
                41.70         15.05        2.1658    1   0   2        12
                49.70         16.85        1.8345    1   1   0         6
                54.76         18.02        1.6764    1   0   3        12
                58.06          2.44        1.5887    2   0   0         6
                59.26         18.09        1.5593    1   1   2        12
                60.32         12.73        1.5344    2   0   1        12
                62.78          2.44        1.4800    0   0   4         2
                66.83          2.92        1.3998    2   0   2        12
                70.15          2.45        1.3416    1   0   4        12
                77.07          5.28        1.2375    2   0   3        12
                81.84          2.89        1.1770    2   1   1        24
                84.02          5.32        1.1519    1   1   4        12
                88.03          3.48        1.1095    1   0   5        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.