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=0.618 from S. Jose de Safira, Minas Gerais, Brazil
      Note: Occupancies calculated assuming complete Fe/Mn disorder
      _database_code_amcsd 0003851

      CELL PARAMETERS:   14.2427   5.7290   5.0856   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    414.967
      Density (g/cm3):      5.544
      MAX. ABS. INTENSITY / VOLUME**2:      123.8877092    
      RIR:      7.277
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.43          1.86        7.1213    2   0   0         2
                24.22          3.40        3.6745    1   1   1         8
                24.35         28.31        3.6555    3   1   0         4
                25.01          1.77        3.5607    4   0   0         2
                30.11        100.00        2.9683    3   1   1         8
                31.22          8.55        2.8645    0   2   0         2
                35.30         13.67        2.5428    0   0   2         2
                35.98         15.46        2.4958    0   2   1         4
                37.90          6.86        2.3738    6   0   0         2
                40.23          2.85        2.2415    3   0   2         4
                40.85          5.32        2.2092    3   2   1         8
                43.35          8.65        2.0874    3   1   2         8
                47.83          6.24        1.9016    0   2   2         4
                49.89          5.66        1.8278    6   2   0         4
                51.59         13.43        1.7717    3   3   0         4
                52.76         16.26        1.7352    6   0   2         4
                53.26         21.88        1.7200    6   2   1         8
                60.17         13.26        1.5379    3   1   3         8
                62.59          4.39        1.4841    6   2   2         8
                63.69         10.87        1.4611    9   1   1         8
                63.80          7.91        1.4589    0   2   3         4
                64.06         12.18        1.4537    3   3   2         8
                65.13          1.08        1.4323    0   4   0         2
                68.00          5.07        1.3786    0   4   1         4
                72.22          2.10        1.3081    9   1   2         8
                74.65          1.48        1.2714    0   0   4         2
                76.67          2.17        1.2429    6   2   3         8
                78.50          2.82        1.2185    9   3   0         4
                79.88          1.26        1.2008    3   1   4         8
                80.58          5.18        1.1922    6   4   1         8
                81.01          2.18        1.1869   12   0   0         2
                83.12          1.02        1.1621    0   2   4         4
                85.67          3.50        1.1339    9   1   3         8
                86.92          3.15        1.1208    6   0   4         4
                87.60          1.13        1.1138    3   5   0         4
                89.11          4.82        1.0989    9   3   2         8
                89.60          1.89        1.0940    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.