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 = 450 C
      _database_code_amcsd 0004021

      CELL PARAMETERS:    8.1438   8.1438   8.1438   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.109
      Density (g/cm3):      3.641
      MAX. ABS. INTENSITY / VOLUME**2:      21.40162409    
      RIR:      1.914
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         24.64        4.7018    1   1   1         8
                31.06         34.40        2.8793    2   2   0        12
                36.60        100.00        2.4554    3   1   1        24
                44.50         46.93        2.0359    4   0   0         6
                55.26          9.69        1.6623    4   2   2        24
                58.93          3.41        1.5673    3   3   3         8
                58.93         38.67        1.5673    5   1   1        24
                64.76         62.79        1.4396    4   4   0        12
                68.12          2.11        1.3766    5   3   1        48
                73.55          3.05        1.2876    6   2   0        24
                76.74          9.14        1.2419    5   3   3        24
                81.97          4.98        1.1755    4   4   4         8
                85.07          1.79        1.1404    5   5   1        24
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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.