Cassiterite
      Baur W H, Khan A A
      Acta Crystallographica B27 (1971) 2133-2139
      Rutile-type compounds. VI.
      SiO2, GeO2 and a comparison with other rutile-type structures
      _database_code_amcsd 0009406

      CELL PARAMETERS:    4.7380   4.7380   3.1865   90.000   90.000   90.000
      SPACE GROUP: P4_2/mnm  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     71.533
      Density (g/cm3):      6.996
      MAX. ABS. INTENSITY / VOLUME**2:      219.3175702    
      RIR:     10.208
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.61        100.00        3.3503    1   1   0         4
                33.90         80.19        2.6441    1   0   1         8
                37.98         22.65        2.3690    2   0   0         4
                39.01          3.77        2.3089    1   1   1         8
                42.67          1.31        2.1189    2   1   0         8
                51.82         64.95        1.7644    2   1   1        16
                54.80         15.52        1.6751    2   2   0         4
                57.88          7.66        1.5933    0   0   2         2
                61.93         14.32        1.4983    3   1   0         8
                64.80         15.01        1.4388    1   1   2         8
                66.02         18.91        1.4151    3   0   1         8
                71.34          7.60        1.3221    2   0   2         8
                78.78         12.18        1.2148    3   2   1        16
                81.21          3.92        1.1845    4   0   0         4
                83.79          8.42        1.1545    2   2   2         8
                87.31          4.08        1.1168    3   3   0         4
                89.87         10.56        1.0915    3   1   2        16
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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.