Ruthenium
      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 0011191

      CELL PARAMETERS:    2.7039   2.7039   4.2817   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     27.110
      Density (g/cm3):     12.380
      MAX. ABS. INTENSITY / VOLUME**2:      540.7594021    
      RIR:     14.223
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                38.44         25.61        2.3416    1   0   0         6
                42.21         25.52        2.1408    0   0   2         2
                44.08        100.00        2.0545    1   0   1        12
                58.41         12.84        1.5800    1   0   2        12
                69.53         13.93        1.3519    1   1   0         6
                78.48         14.00        1.2187    1   0   3        12
                82.36          2.02        1.1708    2   0   0         6
                84.82         14.84        1.1431    1   1   2        12
                86.10         10.69        1.1294    2   0   1        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.