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 = 1196 h
      _database_code_amcsd 0008951

      CELL PARAMETERS:    8.0989   8.0989   8.0989   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    531.224
      Density (g/cm3):      3.297
      MAX. ABS. INTENSITY / VOLUME**2:      13.83411674    
      RIR:      1.366
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.98         33.88        4.6759    1   1   1         8
                31.24         31.90        2.8634    2   2   0        12
                36.81        100.00        2.4419    3   1   1        24
                38.51          5.08        2.3380    2   2   2         8
                44.76         70.45        2.0247    4   0   0         6
                55.59          8.81        1.6532    4   2   2        24
                59.29          3.09        1.5586    3   3   3         8
                59.29         41.77        1.5586    5   1   1        24
                65.16         78.44        1.4317    4   4   0        12
                68.55          3.35        1.3690    5   3   1        48
                74.03          2.78        1.2805    6   2   0        24
                77.25          9.57        1.2351    5   3   3        24
                82.52          7.94        1.1690    4   4   4         8
                85.65          2.71        1.1341    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.