Columbite-(Fe)
      Tarantino S C, Zema M
      American Mineralogist 90 (2005) 1291-1300
      Mixing and ordering behavior in manganocolumbite-ferrocolumbite solid solution:
      A single-crystal X-ray diffraction study
      Sample: BRA n18 Qm=0.745 from S. Jose de Safira, Minas Gerais, Brazil
      Sample: Annealed at T = 650 C for t = 200 m
      Note: Occupancies calculated assuming complete Fe/Mn disorder
      _database_code_amcsd 0003854

      CELL PARAMETERS:   14.2582   5.7290   5.0748   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    414.536
      Density (g/cm3):      5.548
      MAX. ABS. INTENSITY / VOLUME**2:      125.6576188    
      RIR:      7.375
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.42          2.68        7.1291    2   0   0         2
                24.25          4.56        3.6707    1   1   1         8
                24.33         27.11        3.6579    3   1   0         4
                24.98          2.33        3.5645    4   0   0         2
                30.12        100.00        2.9674    3   1   1         8
                31.22          8.95        2.8645    0   2   0         2
                35.37         13.53        2.5374    0   0   2         2
                36.00         14.77        2.4945    0   2   1         4
                37.86          6.81        2.3764    6   0   0         2
                40.29          2.82        2.2384    3   0   2         4
                40.86          5.27        2.2088    3   2   1         8
                43.40          8.23        2.0849    3   1   2         8
                47.89          6.52        1.8994    0   2   2         4
                49.86          5.93        1.8289    6   2   0         4
                50.87          1.18        1.7951    7   1   1         8
                51.58         13.28        1.7720    3   3   0         4
                52.78         16.16        1.7345    6   0   2         4
                53.24         21.34        1.7206    6   2   1         8
                60.28         13.33        1.5354    3   1   3         8
                62.61          4.63        1.4837    6   2   2         8
                63.64         10.97        1.4622    9   1   1         8
                63.91          7.72        1.4566    0   2   3         4
                64.10         12.10        1.4528    3   3   2         8
                68.01          5.22        1.3784    0   4   1         4
                72.21          2.04        1.3083    9   1   2         8
                74.84          1.48        1.2687    0   0   4         2
                76.75          2.11        1.2419    6   2   3         8
                78.44          2.82        1.2193    9   3   0         4
                80.06          1.22        1.1986    3   1   4         8
                80.57          5.37        1.1923    6   4   1         8
                80.91          2.19        1.1882   12   0   0         2
                83.30          1.09        1.1600    0   2   4         4
                85.71          3.57        1.1335    9   1   3         8
                87.07          3.18        1.1192    6   0   4         4
                87.59          1.27        1.1139    3   5   0         4
                89.09          4.83        1.0990    9   3   2         8
                89.70          1.97        1.0931    0   4   3         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.