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: P = 1.38 GPa
      _database_code_amcsd 0008125

      CELL PARAMETERS:    9.4007   9.4007  18.6574   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1648.813
      Density (g/cm3):      4.871
      MAX. ABS. INTENSITY / VOLUME**2:      77.91552631    
      RIR:      5.209
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.37          2.01        5.4135    1   1   2         8
                18.88          1.92        4.7003    2   0   0         4
                25.58          6.03        3.4830    2   1   3        16
                33.10        100.00        2.7068    2   2   4         8
                38.30         12.64        2.3502    4   0   0         4
                38.61          5.74        2.3322    0   0   8         2
                41.91          2.59        2.1558    3   3   2         8
                42.05          3.02        2.1488    3   1   6        16
                42.29          6.98        2.1372    3   2   5        16
                48.67          2.73        1.8707    4   3   1        16
                50.46          1.19        1.8086    5   1   2        16
                52.84          2.53        1.7326    4   1   7        16
                55.28         10.94        1.6618    4   4   0         4
                55.51         27.96        1.6554    4   0   8         8
                60.24          1.15        1.5364    4   3   7        16
                60.35          2.50        1.5338    4   1   9        16
                61.86          2.29        1.4998    6   1   3        16
                63.57          1.92        1.4636    5   4   1        16
                65.36          1.17        1.4278    6   1   5        16
                65.96         14.39        1.4162    6   2   4        16
                66.38          9.47        1.4083    2   2  12         8
                68.65          1.26        1.3671    6   3   3        16
                69.45          4.41        1.3534    4   4   8         8
                82.00          1.54        1.1751    8   0   0         4
                82.77          1.77        1.1661    0   0  16         2
                82.97          1.10        1.1637    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.