Ahrensite
      Finger L W, Hazen R M, Yagi T
      American Mineralogist 64 (1979) 1002-1009
      Crystal structures and electron densities of nickel and iron silicate spinels at
      elevated temperature or pressure
      Locality: synthetic
      _database_code_amcsd 0000748

      CELL PARAMETERS:    8.2360   8.2360   8.2360   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    558.662
      Density (g/cm3):      4.845
      MAX. ABS. INTENSITY / VOLUME**2:      65.00486028    
      RIR:      4.369
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.66         28.83        4.7551    1   1   1         8
                30.70         10.71        2.9119    2   2   0        12
                36.17        100.00        2.4832    3   1   1        24
                37.84         12.92        2.3775    2   2   2         8
                43.98         47.21        2.0590    4   0   0         6
                48.16         13.83        1.8895    3   3   1        24
                54.59          3.35        1.6812    4   2   2        24
                58.21          9.69        1.5850    3   3   3         8
                58.21         15.59        1.5850    5   1   1        24
                63.94         47.12        1.4559    4   4   0        12
                67.25          4.31        1.3921    5   3   1        48
                72.60          1.28        1.3022    6   2   0        24
                75.73          8.90        1.2560    5   3   3        24
                76.76          6.27        1.2416    6   2   2        24
                80.86          6.28        1.1888    4   4   4         8
                83.90          1.81        1.1533    7   1   1        24
                88.93          1.93        1.1006    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.