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 Diamond Anvil Cell without pressure medium: P = 0.0001 GPa
      _database_code_amcsd 0008124

      CELL PARAMETERS:    9.4266   9.4266  18.6952   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1661.270
      Density (g/cm3):      4.834
      MAX. ABS. INTENSITY / VOLUME**2:      77.43583275    
      RIR:      5.216
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.33          1.94        5.4271    1   1   2         8
                18.83          1.88        4.7133    2   0   0         4
                25.51          5.93        3.4918    2   1   3        16
                33.01        100.00        2.7136    2   2   4         8
                38.19         12.76        2.3567    4   0   0         4
                38.52          5.80        2.3369    0   0   8         2
                41.79          2.57        2.1616    3   3   2         8
                41.94          3.07        2.1540    3   1   6        16
                42.18          6.92        2.1426    3   2   5        16
                48.53          2.70        1.8758    4   3   1        16
                50.31          1.18        1.8136    5   1   2        16
                52.70          2.49        1.7368    4   1   7        16
                55.11         10.96        1.6664    4   4   0         4
                55.37         27.87        1.6594    4   0   8         8
                60.07          1.16        1.5402    4   3   7        16
                60.19          2.49        1.5374    4   1   9        16
                61.68          2.28        1.5039    6   1   3        16
                63.37          1.92        1.4676    5   4   1        16
                65.16          1.16        1.4316    6   1   5        16
                65.76         14.52        1.4200    6   2   4        16
                66.22          9.50        1.4113    2   2  12         8
                68.44          1.24        1.3708    6   3   3        16
                69.25          4.49        1.3568    4   4   8         8
                81.73          1.55        1.1783    8   0   0         4
                82.57          1.74        1.1684    0   0  16         2
                82.70          1.10        1.1669    8   1   1        16
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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.