Gahnite
      O'Neill H St C, Dollase W A
      Physics and Chemistry of Minerals 20 (1994) 541-555
      Crystal structures and cation distributions in simple spinels from powder XRD
      structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence
      of the cation distribution in ZnAl2O4
      Sample: 1000, BGI (CuKalpha1 radiation)
      Locality: synthetic
      _database_code_amcsd 0007794

      CELL PARAMETERS:    8.0867   8.0867   8.0867   90.000   90.000   90.000
      SPACE GROUP: Fd-3m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    528.828
      Density (g/cm3):      4.606
      MAX. ABS. INTENSITY / VOLUME**2:      57.00238589    
      RIR:      4.030
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.01          5.09        4.6689    1   1   1         8
                31.29         77.23        2.8591    2   2   0        12
                36.86        100.00        2.4382    3   1   1        24
                44.83          4.05        2.0217    4   0   0         6
                49.11          9.56        1.8552    3   3   1        24
                55.68         24.03        1.6507    4   2   2        24
                59.39          4.34        1.5563    3   3   3         8
                59.39         34.81        1.5563    5   1   1        24
                65.27         42.50        1.4295    4   4   0        12
                68.66          1.32        1.3669    5   3   1        48
                74.16          8.22        1.2786    6   2   0        24
                77.38          9.60        1.2332    5   3   3        24
                85.81          1.25        1.1324    7   1   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.