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 = 5.63 GPa
      _database_code_amcsd 0008128

      CELL PARAMETERS:    9.3309   9.3309  18.5455   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1614.677
      Density (g/cm3):      4.974
      MAX. ABS. INTENSITY / VOLUME**2:      79.51814157    
      RIR:      5.206
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.49          2.11        5.3759    1   1   2         8
                19.02          2.06        4.6655    2   0   0         4
                25.76          5.85        3.4587    2   1   3        16
                33.33        100.00        2.6880    2   2   4         8
                38.60         12.59        2.3327    4   0   0         4
                38.85          5.74        2.3182    0   0   8         2
                42.23          2.46        2.1399    3   3   2         8
                42.35          2.98        2.1343    3   1   6        16
                42.60          7.00        2.1224    3   2   5        16
                49.06          2.72        1.8568    4   3   1        16
                50.86          1.17        1.7953    5   1   2        16
                53.23          2.50        1.7208    4   1   7        16
                55.73         10.90        1.6495    4   4   0         4
                55.92         27.78        1.6443    4   0   8         8
                60.70          1.09        1.5257    4   3   7        16
                60.79          2.49        1.5236    4   1   9        16
                62.37          2.21        1.4888    6   1   3        16
                64.10          1.88        1.4528    5   4   1        16
                65.89          1.13        1.4175    6   1   5        16
                66.51         14.29        1.4059    6   2   4        16
                66.85          9.38        1.3995    2   2  12         8
                69.23          1.26        1.3570    6   3   3        16
                70.00          4.37        1.3440    4   4   8         8
                82.75          1.54        1.1664    8   0   0         4
                83.38          1.74        1.1591    0   0  16         2
                83.73          1.10        1.1551    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.