Ixiolite
      Diffraction data computed using the structure from the paper listed below, 
      along with the cell parameters refined from single crystal data of R070289
      Grice J D, Ferguson R B, Hawthorne F C
      The Canadian Mineralogist 14 (1976) 540-549
      The crystal structures of tantalite, ixiolite and wodginite
      from Bernic lake, Manitoba I. Tantalite and ixiolite
      Locality: Bernic lake, Manitoba, Canada
      _database_code_amcsd 0005132

      CELL PARAMETERS:   4.7410  5.7330  5.1420   90.000   90.000   90.000
      SPACE GROUP: Pbcn      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Ta     0.00000   0.33170   0.25000     0.420     1.897
            Mn     0.00000   0.33170   0.25000     0.300     1.897
            Nb     0.00000   0.33170   0.25000     0.240     1.897
            Ti     0.00000   0.33170   0.25000     0.020     1.897
            Sn     0.00000   0.33170   0.25000     0.005     1.897
            Fe     0.00000   0.33170   0.25000     0.002     1.897
            O      0.72240   0.12170   0.41580     1.000     2.800

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/-  5 +/-  4
            MAX. ABS. INTENSITY / VOLUME**2:      200.9402002    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                24.36         33.53        3.6536    1   1   0
                30.00        100.00        2.9783    1   1   1
                31.20          7.86        2.8665    0   2   0
                34.90         16.65        2.5710    0   0   2
                35.87         21.17        2.5037    0   2   1
                37.96          9.72        2.3705    2   0   0
                39.89          1.47        2.2601    1   0   2
                40.76          2.64        2.2140    1   2   1
                43.02         10.53        2.1026    1   1   2
                47.51          4.56        1.9139    0   2   2
                49.92          3.90        1.8268    2   2   0
                51.56         13.19        1.7724    1   3   0
                52.51         14.31        1.7428    2   0   2
                53.21         20.69        1.7214    2   2   1
                59.58         11.85        1.5517    1   1   3
                60.80          1.20        1.5235    3   1   0
                62.36          3.29        1.4891    2   2   2
                63.21          6.53        1.4711    0   2   3
                63.71          9.39        1.4607    3   1   1
                63.78         11.15        1.4593    1   3   2
                65.08          1.14        1.4332    0   4   0
                67.89          3.59        1.3806    0   4   1
                72.06          1.95        1.3107    3   1   2
                73.70          1.36        1.2855    0   0   4
                76.16          2.81        1.2499    2   2   3
                78.55          2.32        1.2179    3   3   0
                78.95          1.18        1.2126    1   1   4
                80.51          3.67        1.1930    2   4   1
                81.15          1.46        1.1853    4   0   0
                85.22          2.61        1.1387    3   1   3
                86.03          2.20        1.1300    2   0   4
                88.93          3.58        1.1006    3   3   2
                89.04          1.30        1.0995    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.