Holmium
      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 0011179

      CELL PARAMETERS:    3.5773   3.5773   5.6158   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     62.238
      Density (g/cm3):      8.800
      MAX. ABS. INTENSITY / VOLUME**2:      596.5613989    
      RIR:     22.074
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.82         24.14        3.0980    1   0   0         6
                31.87         24.52        2.8079    0   0   2         2
                33.02        100.00        2.7126    1   0   1        12
                43.50         14.72        2.0805    1   0   2        12
                51.06         17.39        1.7887    1   1   0         6
                57.52         17.23        1.6022    1   0   3        12
                59.69          2.51        1.5490    2   0   0         6
                61.46         18.11        1.5086    1   1   2        12
                62.16         13.03        1.4933    2   0   1        12
                66.61          2.25        1.4039    0   0   4         2
                69.28          2.93        1.3563    2   0   2        12
                74.15          2.30        1.2788    1   0   4        12
                80.48          5.22        1.1934    2   0   3        12
                84.53          2.98        1.1463    2   1   1        24
                88.54          5.20        1.1044    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.