Ferrocolumbite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050359
      Wenger M, Armbruster T, Geiger C A
      American Mineralogist 76 (1991) 1897-1904
      Cation distribution in partially ordered columbite from the Kings Mountain
      pegmatite, North Carolina
      sample NCP5, T = 100 K

      CELL PARAMETERS:   14.28813   5.740565   5.119114   90.00000   90.00000   90.00000
      SPACE GROUP: Pbcn
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                24.15          1.22        3.6910    1   1   1
                24.32         31.19        3.6654    3   1   0
                30.02        100.00        2.9802    3   1   1
                31.19          7.38        2.8703    0   2   0
                35.09         15.05        2.5596    0   0   2
                35.90         18.61        2.5036    0   2   1
                37.81          7.84        2.3814    6   0   0
                40.02          2.34        2.2546    3   0   2
                40.74          4.24        2.2161    3   2   1
                43.13         10.14        2.0985    3   1   2
                47.62          5.23        1.9103    0   2   2
                49.77          4.69        1.8327    6   2   0
                51.48         13.45        1.7756    3   3   0
                52.50         15.71        1.7435    6   0   2
                53.09         22.43        1.7255    6   2   1
                59.79         12.56        1.5470    3   1   3
                60.51          1.20        1.5301    9   1   0
                62.31          3.58        1.4901    6   2   2
                63.42          7.75        1.4668    0   2   3
                63.45         10.09        1.4660    9   1   1
                63.80         12.03        1.4589    3   3   2
                64.98          1.33        1.4351    0   4   0
                67.82          4.33        1.3819    0   4   1
                71.88          2.11        1.3133    9   1   2
                74.07          1.42        1.2798    0   0   4
                76.22          2.47        1.2489    6   2   3
                78.23          2.69        1.2218    9   3   0
                79.27          1.30        1.2083    3   1   4
                80.31          4.28        1.1952    6   4   1
                80.68          1.95        1.1907   12   0   0
                85.15          3.13        1.1392    9   1   3
                86.26          2.79        1.1273    6   0   4
                88.14          1.20        1.1080    6   4   2
                88.69          4.33        1.1026    9   3   2
                89.13          1.51        1.0983    0   4   3
                89.13          1.51        1.0983    0   4   3
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.