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 = 2.66 GPa
      _database_code_amcsd 0008126

      CELL PARAMETERS:    9.3786   9.3786  18.6234   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1638.080
      Density (g/cm3):      4.903
      MAX. ABS. INTENSITY / VOLUME**2:      78.14549385    
      RIR:      5.190
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.41          2.02        5.4018    1   1   2         8
                18.92          1.97        4.6893    2   0   0         4
                25.63          6.03        3.4754    2   1   3        16
                33.17        100.00        2.7009    2   2   4         8
                38.39         12.68        2.3447    4   0   0         4
                38.68          5.77        2.3279    0   0   8         2
                42.01          2.52        2.1508    3   3   2         8
                42.14          3.05        2.1443    3   1   6        16
                42.38          7.04        2.1326    3   2   5        16
                48.80          2.75        1.8663    4   3   1        16
                50.58          1.17        1.8044    5   1   2        16
                52.96          2.51        1.7289    4   1   7        16
                55.42         10.82        1.6579    4   4   0         4
                55.64         27.72        1.6520    4   0   8         8
                60.38          1.13        1.5330    4   3   7        16
                60.48          2.48        1.5307    4   1   9        16
                62.02          2.28        1.4964    6   1   3        16
                63.74          1.90        1.4602    5   4   1        16
                65.52          1.14        1.4246    6   1   5        16
                66.13         14.26        1.4130    6   2   4        16
                66.52          9.40        1.4056    2   2  12         8
                68.84          1.26        1.3639    6   3   3        16
                69.62          4.39        1.3504    4   4   8         8
                82.23          1.53        1.1723    8   0   0         4
                82.95          1.73        1.1640    0   0  16         2
                83.21          1.07        1.1610    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.