Ferrocolumbite
      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=0.988 from S. Jose de Safira, Minas Gerais, Brazil
      Sample: Annealed at T = 950 C for t = 3 h
      Note: Occupancies calculated assuming complete Fe/Mn disorder
      _database_code_amcsd 0003838

      CELL PARAMETERS:   14.2852   5.7361   5.0574   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    414.410
      Density (g/cm3):      5.552
      MAX. ABS. INTENSITY / VOLUME**2:      127.8867438    
      RIR:      7.500
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.39          4.45        7.1426    2   0   0         2
                16.65          1.25        5.3230    1   1   0         4
                24.28          7.49        3.6664    1   1   1         8
                24.29         25.80        3.6638    3   1   0         4
                24.93          3.84        3.5713    4   0   0         2
                30.12        100.00        2.9670    3   1   1         8
                31.19          9.48        2.8681    0   2   0         2
                35.50         13.33        2.5287    0   0   2         2
                36.00         14.01        2.4948    0   2   1         4
                37.79          6.74        2.3809    6   0   0         2
                40.39          2.76        2.2333    3   0   2         4
                40.83          5.20        2.2099    3   2   1         8
                43.48          7.69        2.0811    3   1   2         8
                43.87          1.17        2.0637    4   0   2         4
                44.29          1.14        2.0452    4   2   1         8
                47.96          6.89        1.8967    0   2   2         4
                49.77          6.23        1.8319    6   2   0         4
                50.80          1.99        1.7972    7   1   1         8
                51.50         13.09        1.7743    3   3   0         4
                52.81         15.95        1.7334    6   0   2         4
                53.18         20.60        1.7224    6   2   1         8
                54.83          1.16        1.6743    3   3   1         8
                60.45         13.42        1.5315    3   1   3         8
                62.62          4.91        1.4835    6   2   2         8
                63.54         10.96        1.4642    9   1   1         8
                64.07          7.49        1.4533    0   2   3         4
                64.12         11.98        1.4524    3   3   2         8
                67.94          5.42        1.3796    0   4   1         4
                72.17          1.96        1.3089    9   1   2         8
                75.14          1.50        1.2644    0   0   4         2
                76.85          2.02        1.2405    6   2   3         8
                78.28          2.79        1.2213    9   3   0         4
                80.33          1.18        1.1952    3   1   4         8
                80.45          5.59        1.1937    6   4   1         8
                80.72          2.15        1.1904   12   0   0         2
                83.57          1.17        1.1569    0   2   4         4
                85.77          3.62        1.1329    9   1   3         8
                87.32          3.21        1.1167    6   0   4         4
                87.45          1.44        1.1153    3   5   0         4
                89.02          4.78        1.0997    9   3   2         8
                89.79          2.07        1.0923    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.