Scandium
      Spedding F H, Daane A H, Herrmann K W
      Acta Crystallographica 9 (1956) 559-563
      The crystal structures and lattice parameters of high-purity scandium,
      yttrium and the rare earth metals
      Locality: synthetic
      Note: sample 99.6% pure
      _database_code_amcsd 0009167

      CELL PARAMETERS:    3.3090   3.3090   5.2733   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     50.004
      Density (g/cm3):      2.985
      MAX. ABS. INTENSITY / VOLUME**2:      57.91498380    
      RIR:      6.317
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.21         24.75        2.8657    1   0   0         6
                34.00         25.65        2.6367    0   0   2         2
                35.66        100.00        2.5179    1   0   1        12
                46.82         13.81        1.9403    1   0   2        12
                55.54         15.06        1.6545    1   1   0         6
                61.93         15.10        1.4984    1   0   3        12
                65.10          2.09        1.4328    2   0   0         6
                66.75         15.24        1.4014    1   1   2        12
                67.77         10.80        1.3827    2   0   1        12
                71.57          1.97        1.3183    0   0   4         2
                75.52          2.44        1.2590    2   0   2        12
                80.13          2.00        1.1977    1   0   4        12
                87.92          4.56        1.1106    2   0   3        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.