Zirkelite
      Mazzi F, Munno R
      American Mineralogist 68 (1983) 262-276
      Calciobetafite (new mineral of the pyrochlore group) and related minerals from
      Campi Flegrei, Italy; crystal structures of polymignyte and zirkelite:
      comparison with pyrochlore and zirconolite
      Note: B(2,3) for Ti61 has been changed to satisfy symmetry constraints
      _database_code_amcsd 0000893

      CELL PARAMETERS:    7.2870   7.2870  16.8860   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    776.524
      Density (g/cm3):      5.498
      MAX. ABS. INTENSITY / VOLUME**2:      109.5724082    
      RIR:      6.489
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.74          1.85        5.6287    0   0   3         2
                25.38          3.99        3.5088    0   1   4         6
                26.65          2.73        3.3453    1   1   2         6
                28.78          1.25        3.1017    0   2   1         6
                30.24         99.91        2.9557    2   0   2         6
                31.80         27.45        2.8143    0   0   6         2
                35.52         29.34        2.5274    0   2   4         6
                39.07          4.23        2.3056    2   0   5         6
                39.25          1.09        2.2954    2   1   2         6
                45.07          1.46        2.0114    1   1   7         6
                49.93          1.43        1.8264    1   1   8         6
                50.07         30.70        1.8218    2   2   0         3
                50.13          1.77        1.8196    2   1   6         6
                52.13         23.01        1.7544    2   0   8         6
                52.82          1.76        1.7332    2   2   3         6
                56.95          1.12        1.6168    3   1   4         6
                59.62         11.83        1.5508    0   4   2         6
                60.54         18.43        1.5293    2   2   6         6
                62.37          7.61        1.4888    0   2  10         6
                62.89          6.66        1.4778    4   0   4         6
                66.44          1.24        1.4072    0   0  12         2
                68.52          1.06        1.3695    2   3   4         6
                75.19          5.40        1.2637    0   4   8         6
                81.51          2.51        1.1809    4   2   2         6
                83.94          2.80        1.1528    4   0  10         6
                84.40          1.83        1.1477    2   4   4         6
                86.36          1.66        1.1266    2   0  14         6
                87.62          3.28        1.1136    2   2  12         6
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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.