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=0.685 from S. Jose de Safira, Minas Gerais, Brazil
      Sample: Annealed at T = 600 C for t = 20 m
      Note: Occupancies calculated assuming complete Fe/Mn disorder
      _database_code_amcsd 0003852

      CELL PARAMETERS:   14.2445   5.7265   5.0789   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    414.292
      Density (g/cm3):      5.552
      MAX. ABS. INTENSITY / VOLUME**2:      124.8588633    
      RIR:      7.322
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.43          2.31        7.1223    2   0   0         2
                24.24          3.96        3.6714    1   1   1         8
                24.35         27.73        3.6551    3   1   0         4
                25.00          2.02        3.5611    4   0   0         2
                30.12        100.00        2.9667    3   1   1         8
                31.24          8.73        2.8633    0   2   0         2
                35.35         13.67        2.5394    0   0   2         2
                36.01         15.09        2.4942    0   2   1         4
                37.90          6.84        2.3741    6   0   0         2
                40.27          2.85        2.2393    3   0   2         4
                40.87          5.28        2.2081    3   2   1         8
                43.39          8.46        2.0855    3   1   2         8
                47.88          6.36        1.8999    0   2   2         4
                49.90          5.79        1.8276    6   2   0         4
                50.90          1.01        1.7939    7   1   1         8
                51.61         13.35        1.7711    3   3   0         4
                52.79         16.17        1.7342    6   0   2         4
                53.27         21.65        1.7196    6   2   1         8
                60.24         13.28        1.5362    3   1   3         8
                62.63          4.50        1.4834    6   2   2         8
                63.69         10.93        1.4610    9   1   1         8
                63.88          7.81        1.4573    0   2   3         4
                64.10         12.13        1.4527    3   3   2         8
                65.16          1.02        1.4316    0   4   0         2
                68.04          5.14        1.3779    0   4   1         4
                72.25          2.07        1.3077    9   1   2         8
                74.77          1.47        1.2697    0   0   4         2
                76.74          2.14        1.2420    6   2   3         8
                78.51          2.82        1.2184    9   3   0         4
                79.99          1.23        1.1994    3   1   4         8
                80.61          5.26        1.1917    6   4   1         8
                81.00          2.18        1.1870   12   0   0         2
                83.24          1.05        1.1607    0   2   4         4
                85.73          3.53        1.1333    9   1   3         8
                87.03          3.17        1.1197    6   0   4         4
                87.64          1.19        1.1134    3   5   0         4
                89.14          4.82        1.0985    9   3   2         8
                89.69          1.92        1.0932    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.