Ferrocolumbite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R050348 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: 14.23914 5.728415 5.098498 90.00000 90.00000 90.00000 SPACE GROUP: Pbcn X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 24.22 1.22 3.6792 1 1 1 24.38 31.19 3.6548 3 1 0 30.11 100.00 2.9705 3 1 1 31.25 7.38 2.8642 0 2 0 35.22 15.05 2.5492 0 0 2 35.98 18.61 2.4971 0 2 1 37.93 7.84 2.3732 6 0 0 40.17 2.34 2.2458 3 0 2 40.85 4.24 2.2100 3 2 1 43.28 10.14 2.0909 3 1 2 47.77 5.23 1.9042 0 2 2 49.91 4.69 1.8274 6 2 0 51.60 13.45 1.7715 3 3 0 52.70 15.71 1.7370 6 0 2 53.25 22.43 1.7203 6 2 1 60.03 12.56 1.5410 3 1 3 60.72 1.20 1.5250 9 1 0 62.53 3.58 1.4852 6 2 2 63.66 7.75 1.4616 0 2 3 63.68 10.09 1.4611 9 1 1 63.99 12.03 1.4547 3 3 2 65.13 1.33 1.4321 0 4 0 67.98 4.33 1.3787 0 4 1 72.16 2.11 1.3087 9 1 2 74.41 1.42 1.2746 0 0 4 76.53 2.47 1.2445 6 2 3 78.48 2.69 1.2183 9 3 0 79.63 1.30 1.2035 3 1 4 80.55 4.28 1.1922 6 4 1 81.00 1.95 1.1866 12 0 0 85.52 3.13 1.1350 9 1 3 86.67 2.79 1.1229 6 0 4 88.44 1.20 1.1050 6 4 2 89.03 4.33 1.0992 9 3 2 89.44 1.51 1.0951 0 4 3 89.44 1.51 1.0951 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.