Fe2.18Si.92O4
      Yamanaka T, Shimazu H, Ota K
      Physics and Chemistry of Minerals 28 (2001) 110-118
      Electric conductivity of Fe2SiO4-Fe3O4 spinel solid solutions
      Sample: Fe(3-x)SixO4, x = 0.920, synthesized at 1200 C, 10 GPa
      Locality: synthetic
      _database_code_amcsd 0008506

      CELL PARAMETERS:    8.2560   8.2560   8.2560   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    562.742
      Density (g/cm3):      4.862
      MAX. ABS. INTENSITY / VOLUME**2:      65.80122049    
      RIR:      4.407
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.62         24.26        4.7666    1   1   1         8
                30.63         12.68        2.9189    2   2   0        12
                36.08        100.00        2.4893    3   1   1        24
                37.75         12.19        2.3833    2   2   2         8
                43.86         41.75        2.0640    4   0   0         6
                48.04         11.08        1.8941    3   3   1        24
                54.45          3.94        1.6852    4   2   2        24
                58.05          9.09        1.5889    3   3   3         8
                58.05         15.75        1.5889    5   1   1        24
                63.77         43.70        1.4595    4   4   0        12
                67.07          3.39        1.3955    5   3   1        48
                72.39          1.46        1.3054    6   2   0        24
                75.51          8.33        1.2590    5   3   3        24
                76.54          5.73        1.2446    6   2   2        24
                80.62          5.07        1.1917    4   4   4         8
                83.65          1.34        1.1561    7   1   1        24
                88.66          1.97        1.1033    6   4   2        48
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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.