Spinel
      Martignago F, Andreozzi G B, Dal Negro A
      American Mineralogist 91 (2006) 306-312
      Thermodynamics and kinetics of cation ordering in natural and synthetic
      Mg(Al,Fe3+)2O4 spinels from in situ high-temperature X-ray diffraction
      Locality: synthetic
      Sample: MgFe20, T = 550 C
      _database_code_amcsd 0004023

      CELL PARAMETERS:    8.1520   8.1520   8.1520   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    541.742
      Density (g/cm3):      3.628
      MAX. ABS. INTENSITY / VOLUME**2:      21.12279156    
      RIR:      1.896
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.85         24.49        4.7066    1   1   1         8
                31.03         34.71        2.8822    2   2   0        12
                36.56        100.00        2.4579    3   1   1        24
                44.45         46.69        2.0380    4   0   0         6
                55.20          9.63        1.6640    4   2   2        24
                58.86          3.35        1.5689    3   3   3         8
                58.86         38.29        1.5689    5   1   1        24
                64.68         61.89        1.4411    4   4   0        12
                68.04          2.06        1.3779    5   3   1        48
                73.47          2.98        1.2889    6   2   0        24
                76.65          8.91        1.2432    5   3   3        24
                81.87          4.85        1.1766    4   4   4         8
                84.96          1.75        1.1415    5   5   1        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.