Praseodymium
      Wyckoff R W G
      Crystal Structures 1 (1963) 7-83
      Second edition. Interscience Publishers, New York, New York
      Double hexagonal closest packed, dhcp, structure
      _database_code_amcsd 0011205

      CELL PARAMETERS:    3.6725   3.6725  11.8354   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    138.241
      Density (g/cm3):      6.769
      MAX. ABS. INTENSITY / VOLUME**2:      292.0659696    
      RIR:     14.049
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.06          7.93        3.1805    1   0   0         6
                29.07         43.25        3.0715    1   0   1        12
                30.21         34.63        2.9588    0   0   4         2
                31.95        100.00        2.8015    1   0   2        12
                36.28         23.06        2.4761    1   0   3        12
                41.69          5.01        2.1663    1   0   4        12
                47.91          9.53        1.8989    1   0   5        12
                49.65         22.51        1.8362    1   1   0         6
                54.76         17.98        1.6763    1   0   6        12
                58.57          4.71        1.5761    2   0   1        12
                59.22         24.14        1.5602    1   1   4        12
                60.26         12.75        1.5358    2   0   2        12
                62.18          3.79        1.4929    1   0   7        12
                62.81          3.25        1.4794    0   0   8         2
                63.02          3.61        1.4749    2   0   3        12
                71.47          2.29        1.3200    2   0   5        12
                77.03          5.28        1.2380    2   0   6        12
                78.75          1.63        1.2153    1   0   9        12
                80.27          1.02        1.1960    2   1   1        24
                81.75          2.89        1.1780    2   1   2        24
                83.44          1.35        1.1584    2   0   7        12
                84.01          7.08        1.1520    1   1   8        12
                88.06          3.47        1.1092    1   0  10        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.