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=0.714 from S. Jose de Safira, Minas Gerais, Brazil
      Sample: Annealed at T = 650 C for t = 20 m
      Note: Occupancies calculated assuming complete Fe/Mn disorder
      _database_code_amcsd 0003832

      CELL PARAMETERS:   14.2501   5.7263   5.0767   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    414.260
      Density (g/cm3):      5.553
      MAX. ABS. INTENSITY / VOLUME**2:      125.5403279    
      RIR:      7.361
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.42          2.48        7.1251    2   0   0         2
                24.25          4.22        3.6706    1   1   1         8
                24.35         27.40        3.6559    3   1   0         4
                24.99          2.15        3.5625    4   0   0         2
                30.12        100.00        2.9667    3   1   1         8
                31.24          8.85        2.8631    0   2   0         2
                35.36         13.56        2.5384    0   0   2         2
                36.01         14.94        2.4939    0   2   1         4
                37.88          6.84        2.3750    6   0   0         2
                40.28          2.81        2.2387    3   0   2         4
                40.87          5.27        2.2081    3   2   1         8
                43.40          8.33        2.0851    3   1   2         8
                47.89          6.47        1.8994    0   2   2         4
                49.89          5.89        1.8280    6   2   0         4
                50.89          1.09        1.7943    7   1   1         8
                51.61         13.32        1.7711    3   3   0         4
                52.79         16.21        1.7343    6   0   2         4
                53.26         21.46        1.7199    6   2   1         8
                60.26         13.35        1.5357    3   1   3         8
                62.63          4.59        1.4834    6   2   2         8
                63.67         10.99        1.4615    9   1   1         8
                63.90          7.77        1.4568    0   2   3         4
                64.11         12.13        1.4525    3   3   2         8
                68.04          5.20        1.3778    0   4   1         4
                72.23          2.06        1.3079    9   1   2         8
                74.81          1.49        1.2692    0   0   4         2
                76.75          2.14        1.2418    6   2   3         8
                78.48          2.83        1.2186    9   3   0         4
                80.03          1.23        1.1990    3   1   4         8
                80.61          5.35        1.1918    6   4   1         8
                80.96          2.19        1.1875   12   0   0         2
                83.28          1.08        1.1603    0   2   4         4
                85.72          3.57        1.1333    9   1   3         8
                87.06          3.18        1.1194    6   0   4         4
                87.65          1.24        1.1134    3   5   0         4
                89.13          4.85        1.0986    9   3   2         8
                89.72          1.95        1.0929    0   4   3         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.