Thulium
      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 0011198

      CELL PARAMETERS:    3.5375   3.5375   5.5546   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     60.197
      Density (g/cm3):      9.319
      MAX. ABS. INTENSITY / VOLUME**2:      672.9898559    
      RIR:     23.515
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                29.15         24.10        3.0636    1   0   0         6
                32.23         24.52        2.7773    0   0   2         2
                33.40        100.00        2.6826    1   0   1        12
                44.01         14.72        2.0576    1   0   2        12
                51.68         17.35        1.7687    1   1   0         6
                58.22         17.16        1.5846    1   0   3        12
                60.43          2.50        1.5318    2   0   0         6
                62.23         18.01        1.4919    1   1   2        12
                62.94         12.96        1.4767    2   0   1        12
                67.44          2.24        1.3886    0   0   4         2
                70.16          2.91        1.3413    2   0   2        12
                75.11          2.29        1.2648    1   0   4        12
                81.56          5.19        1.1802    2   0   3        12
                85.70          2.97        1.1336    2   1   1        24
                89.79          5.20        1.0922    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.