Hercynite
      Lavina B, Princivalle F, Della Giusta A
      Physics and Chemistry of Minerals 32 (2005) 83-88
      Controlled time-temperature oxidation reaction in a synthetic Mg-hercynite
      Spinel structure
      Sample: Annealing temperature and time T = 600 C, t = 860 h
      _database_code_amcsd 0008950

      CELL PARAMETERS:    8.1045   8.1045   8.1045   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    532.327
      Density (g/cm3):      3.416
      MAX. ABS. INTENSITY / VOLUME**2:      16.31110204    
      RIR:      1.555
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.97         24.89        4.6791    1   1   1         8
                31.22         35.18        2.8654    2   2   0        12
                36.78        100.00        2.4436    3   1   1        24
                38.48          3.24        2.3396    2   2   2         8
                44.73         57.88        2.0261    4   0   0         6
                55.55          9.79        1.6543    4   2   2        24
                59.24         40.40        1.5597    5   1   1        24
                59.24          3.24        1.5597    3   3   3         8
                65.11         72.16        1.4327    4   4   0        12
                68.49          2.42        1.3699    5   3   1        48
                73.97          3.10        1.2814    6   2   0        24
                77.18          9.45        1.2359    5   3   3        24
                82.45          6.51        1.1698    4   4   4         8
                85.58          2.17        1.1349    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.