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 = 7.69 GPa
      _database_code_amcsd 0008129

      CELL PARAMETERS:    9.2998   9.2998  18.4957   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1599.624
      Density (g/cm3):      5.021
      MAX. ABS. INTENSITY / VOLUME**2:      80.25107112    
      RIR:      5.205
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.54          2.15        5.3592    1   1   2         8
                19.09          2.06        4.6499    2   0   0         4
                25.84          6.01        3.4478    2   1   3        16
                33.44        100.00        2.6796    2   2   4         8
                38.73         12.49        2.3249    4   0   0         4
                38.96          5.85        2.3120    0   0   8         2
                42.38          2.48        2.1329    3   3   2         8
                42.48          2.98        2.1279    3   1   6        16
                42.74          6.94        2.1158    3   2   5        16
                49.24          2.75        1.8506    4   3   1        16
                51.04          1.14        1.7894    5   1   2        16
                53.41          2.51        1.7155    4   1   7        16
                55.93         10.93        1.6440    4   4   0         4
                56.10         27.70        1.6394    4   0   8         8
                60.91          1.10        1.5209    4   3   7        16
                60.99          2.49        1.5191    4   1   9        16
                62.60          2.20        1.4839    6   1   3        16
                64.34          1.86        1.4479    5   4   1        16
                66.13          1.18        1.4130    6   1   5        16
                66.76         14.23        1.4013    6   2   4        16
                67.06          9.41        1.3956    2   2  12         8
                69.50          1.28        1.3526    6   3   3        16
                70.26          4.34        1.3398    4   4   8         8
                83.08          1.55        1.1625    8   0   0         4
                83.66          1.73        1.1560    0   0  16         2
                84.08          1.12        1.1513    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.