Mannardite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R060966
      Shi-bin X, Hai-fu F, Xiao-jing W, Fang-hua L
      Acta Crystallographica A46 (1990) 929-934
      Direct methods in superspace. II The first application to an unknown
      incommensurate modulated structure
      Note: this is the average structure, isomorphous with hollandite
      Note: y-coordinate of O2 altered from .248 to make regular TiO6 polyhedra
      Locality: Shiti barite deposit, Ankang County, Shaanxi, China
      _database_code_amcsd 0009328

      CELL PARAMETERS:  10.0700 10.0700  2.9500   90.000   90.000   90.000
      SPACE GROUP: I4/m      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Ba     0.00000   0.00000   0.50000     0.400     0.500
            Ti     0.36600   0.15500   0.00000     1.000     2.500
            O      0.16500   0.19800   0.00000     1.000     3.000
            O      0.57200   0.14800   0.00000     1.000     3.750

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  9 +/-  9 +/-  2
            MAX. ABS. INTENSITY / VOLUME**2:      34.19386312    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                12.43         36.17        7.1206    1   1   0
                17.61          5.40        5.0350    2   0   0
                25.01         15.46        3.5603    2   2   0
                28.02         33.96        3.1844    3   1   0
                28.02         66.04        3.1844    1   3   0
                31.60          6.08        2.8310    1   0   1
                35.66         20.01        2.5175    4   0   0
                36.41          6.65        2.4677    2   1   1
                36.41         33.27        2.4677    1   2   1
                40.04          4.92        2.2517    4   2   0
                40.04          6.65        2.2517    2   4   0
                40.72         32.39        2.2159    3   0   1
                44.68          9.96        2.0281    3   2   1
                45.95          9.89        1.9749    5   1   0
                45.95          1.20        1.9749    1   5   0
                48.38         11.12        1.8813    4   1   1
                51.32          9.86        1.7801    4   4   0
                54.69          8.90        1.6783    6   0   0
                55.22          1.66        1.6633    4   3   1
                58.43         25.01        1.5794    2   5   1
                58.43          1.26        1.5794    5   2   1
                63.02          6.65        1.4750    0   0   2
                64.55          8.08        1.4437    6   1   1
                65.55          1.01        1.4241    5   5   0
                67.49         11.36        1.3878    5   4   1
                68.91          1.22        1.3627    2   2   2
                70.34          2.83        1.3384    3   1   2
                70.34          5.35        1.3384    1   3   2
                71.33          3.75        1.3223    7   3   0
                71.33          1.65        1.3223    3   7   0
                74.57          1.19        1.2727    4   0   2
                77.34          1.36        1.2338    4   2   2
                77.34          1.06        1.2338    2   4   2
                81.44          1.77        1.1818    5   1   2
                82.38          1.53        1.1706    5   7   0
                84.17          1.28        1.1502    1   8   1
                85.49          2.71        1.1358    4   4   2
                87.77          1.07        1.1120    1   9   0
                88.18          2.67        1.1079    6   0   2
                89.56          1.61        1.0945    3   8   1
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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.