Braunite
      Miletich R, Allan D R, Angel R J
      Physics and Chemistry of Minerals 25 (1998) 183-192
      Structural control of polyhedral compression in synthetic braunite,
      Mn2+Mn3+6O8SiO4
      Sample in air: P = 0.0001 GPa
      _database_code_amcsd 0008123

      CELL PARAMETERS:    9.4264   9.4264  18.6962   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1661.289
      Density (g/cm3):      4.834
      MAX. ABS. INTENSITY / VOLUME**2:      77.84686425    
      RIR:      5.243
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.33          1.91        5.4271    1   1   2         8
                18.83          1.88        4.7132    2   0   0         4
                25.51          5.78        3.4918    2   1   3        16
                33.01        100.00        2.7136    2   2   4         8
                38.19         12.86        2.3566    4   0   0         4
                38.52          5.80        2.3370    0   0   8         2
                41.79          2.56        2.1616    3   3   2         8
                41.94          3.09        2.1540    3   1   6        16
                42.18          6.84        2.1426    3   2   5        16
                48.53          2.66        1.8758    4   3   1        16
                50.31          1.18        1.8135    5   1   2        16
                52.70          2.43        1.7368    4   1   7        16
                55.11         11.02        1.6664    4   4   0         4
                55.37         28.03        1.6594    4   0   8         8
                60.07          1.15        1.5402    4   3   7        16
                60.19          2.45        1.5375    4   1   9        16
                61.68          2.30        1.5039    6   1   3        16
                63.38          1.89        1.4676    5   4   1        16
                65.16          1.11        1.4316    6   1   5        16
                65.76         14.75        1.4200    6   2   4        16
                66.21          9.58        1.4114    2   2  12         8
                68.44          1.22        1.3708    6   3   3        16
                69.25          4.58        1.3568    4   4   8         8
                81.73          1.59        1.1783    8   0   0         4
                82.56          1.76        1.1685    0   0  16         2
                82.70          1.09        1.1669    8   1   1        16
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.