Fe2.25Si.75O4
      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 = 0.750, synthesized at 1200 C, 10 GPa
      Locality: synthetic
      _database_code_amcsd 0008505

      CELL PARAMETERS:    8.2860   8.2860   8.2860   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    568.899
      Density (g/cm3):      4.920
      MAX. ABS. INTENSITY / VOLUME**2:      70.22726869    
      RIR:      4.648
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.55         18.48        4.7839    1   1   1         8
                30.51         16.37        2.9295    2   2   0        12
                35.95        100.00        2.4983    3   1   1        24
                37.60         10.44        2.3920    2   2   2         8
                43.70         35.19        2.0715    4   0   0         6
                47.85          6.76        1.9009    3   3   1        24
                54.23          5.35        1.6914    4   2   2        24
                57.82          8.22        1.5946    3   3   3         8
                57.82         17.95        1.5946    5   1   1        24
                63.51         43.30        1.4648    4   4   0        12
                66.79          2.51        1.4006    5   3   1        48
                72.09          2.00        1.3101    6   2   0        24
                75.19          8.36        1.2636    5   3   3        24
                76.22          4.86        1.2492    6   2   2        24
                80.27          4.36        1.1960    4   4   4         8
                88.25          2.32        1.1073    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.