Hafnon
      Speer J A, Cooper B J
      American Mineralogist 67 (1982) 804-808
      Crystal structure of synthetic hafnon, HfSiO4, comparison with zircon and the
      actinide orthosilicates
      _database_code_amcsd 0000871

      CELL PARAMETERS:    6.5725   6.5725   5.9632   90.000   90.000   90.000
      SPACE GROUP: I4_1/amd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    257.597
      Density (g/cm3):      6.976
      MAX. ABS. INTENSITY / VOLUME**2:      196.8627895    
      RIR:      9.189
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.11         89.38        4.4164    1   0   1         8
                27.13        100.00        3.2863    2   0   0         4
                34.00         33.57        2.6364    2   1   1        16
                35.78         73.20        2.5095    1   1   2         8
                38.75         21.75        2.3237    2   2   0         4
                40.87          2.24        2.2082    2   0   2         8
                44.03         22.95        2.0564    3   0   1         8
                47.81         16.48        1.9026    1   0   3         8
                52.49         20.38        1.7433    3   2   1        16
                53.76         57.49        1.7050    3   1   2        16
                55.83         10.05        1.6466    2   1   3        16
                55.96         14.50        1.6431    4   0   0         4
                60.08          7.95        1.5400    4   1   1        16
                62.28          3.79        1.4908    0   0   4         2
                63.16          4.91        1.4721    3   0   3         8
                63.28         13.05        1.4697    4   2   0         8
                68.22         16.03        1.3747    3   3   2         8
                69.20         11.73        1.3576    2   0   4         8
                70.03          3.51        1.3435    3   2   3        16
                73.82          7.05        1.2837    4   3   1        16
                73.82          2.03        1.2837    5   0   1         8
                75.82          9.50        1.2548    2   2   4         8
                76.62          4.77        1.2436    4   1   3        16
                80.29          2.44        1.1957    5   2   1        16
                81.32         12.48        1.1831    5   1   2        16
                82.14          1.16        1.1735    1   0   5         8
                83.14          3.40        1.1619    4   4   0         4
                88.47          3.86        1.1051    2   1   5        16
                88.57          5.85        1.1041    4   0   4         8
                89.35          2.37        1.0964    5   0   3         8
                89.35          2.44        1.0964    4   3   3        16
                89.46          4.07        1.0954    6   0   0         4
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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.