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: 1200, BGI (CuKalpha1 radiation)
      Locality: synthetic
      _database_code_amcsd 0007796

      CELL PARAMETERS:    8.0876   8.0876   8.0876   90.000   90.000   90.000
      SPACE GROUP: Fd-3m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    529.004
      Density (g/cm3):      4.604
      MAX. ABS. INTENSITY / VOLUME**2:      57.29607976    
      RIR:      4.052
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.01          5.13        4.6694    1   1   1         8
                31.28         76.97        2.8594    2   2   0        12
                36.86        100.00        2.4385    3   1   1        24
                44.83          4.00        2.0219    4   0   0         6
                49.10          9.48        1.8554    3   3   1        24
                55.68         24.14        1.6509    4   2   2        24
                59.38          4.42        1.5565    3   3   3         8
                59.38         34.80        1.5565    5   1   1        24
                65.26         42.59        1.4297    4   4   0        12
                68.66          1.34        1.3671    5   3   1        48
                74.15          8.33        1.2788    6   2   0        24
                77.37          9.72        1.2333    5   3   3        24
                85.80          1.24        1.1325    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.