Columbite-(Fe)
      dos Santos C A, Zawislak L I, Kinast E J, Antonietti V, da Cunha J B M
      Brazilian Journal of Physics 31 (2001) 616-631
      Crystal chemistry and structure of the orthorhombic
      (Fe,Mn)(Ta,Nb)2O6 family of compounds
      Note: Sample Fe(Ta0.4Nb0.6)2O6
      Locality: Brazil
      _database_code_amcsd 0018629

      CELL PARAMETERS:   14.2737   5.7354   5.0554   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    413.864
      Density (g/cm3):      6.549
      MAX. ABS. INTENSITY / VOLUME**2:      182.5713812    
      RIR:      9.078
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.40          9.09        7.1368    2   0   0         2
                16.66          2.33        5.3219    1   1   0         4
                24.28         11.32        3.6653    1   1   1         8
                24.31         27.93        3.6619    3   1   0         4
                24.95          5.83        3.5684    4   0   0         2
                30.13        100.00        2.9656    3   1   1         8
                31.19          8.64        2.8677    0   2   0         2
                35.51         13.11        2.5277    0   0   2         2
                36.01         17.52        2.4943    0   2   1         4
                37.76          1.10        2.3827    2   0   2         4
                37.82          8.51        2.3789    6   0   0         2
                40.35          1.25        2.2353    4   2   0         4
                40.41          1.51        2.2322    3   0   2         4
                40.85          3.64        2.2092    3   2   1         8
                43.50          7.80        2.0802    3   1   2         8
                43.89          1.53        2.0626    4   0   2         4
                44.31          1.92        2.0444    4   2   1         8
                47.98          6.52        1.8962    0   2   2         4
                49.80          5.89        1.8310    6   2   0         4
                50.84          3.06        1.7960    7   1   1         8
                51.52         12.82        1.7740    3   3   0         4
                52.85         15.35        1.7324    6   0   2         4
                53.21         18.17        1.7215    6   2   1         8
                54.82          1.03        1.6745    4   2   2         8
                60.48         12.34        1.5308    3   1   3         8
                62.65          4.13        1.4828    6   2   2         8
                63.59         10.00        1.4632    9   1   1         8
                64.09          6.30        1.4529    0   2   3         4
                64.14         11.02        1.4520    3   3   2         8
                67.95          4.78        1.3794    0   4   1         4
                72.23          1.87        1.3080    9   1   2         8
                75.18          1.55        1.2638    0   0   4         2
                76.89          2.20        1.2399    6   2   3         8
                78.33          2.40        1.2206    9   3   0         4
                80.37          1.04        1.1947    3   1   4         8
                80.48          4.53        1.1933    6   4   1         8
                80.80          1.62        1.1895   12   0   0         2
                85.83          2.88        1.1322    9   1   3         8
                87.37          2.21        1.1161    6   0   4         4
                87.47          1.02        1.1151    3   5   0         4
                89.07          3.92        1.0992    9   3   2         8
                89.81          1.53        1.0920    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.