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: 1100, BGI (CuKalpha1 radiation)
      Locality: synthetic
      _database_code_amcsd 0007795

      CELL PARAMETERS:    8.0871   8.0871   8.0871   90.000   90.000   90.000
      SPACE GROUP: Fd-3m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    528.906
      Density (g/cm3):      4.605
      MAX. ABS. INTENSITY / VOLUME**2:      57.69236440    
      RIR:      4.079
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.01          5.05        4.6691    1   1   1         8
                31.28         76.95        2.8592    2   2   0        12
                36.86        100.00        2.4384    3   1   1        24
                44.83          4.06        2.0218    4   0   0         6
                49.10          9.62        1.8553    3   3   1        24
                55.68         24.36        1.6508    4   2   2        24
                59.38          4.43        1.5564    3   3   3         8
                59.38         35.38        1.5564    5   1   1        24
                65.27         43.40        1.4296    4   4   0        12
                68.66          1.35        1.3670    5   3   1        48
                74.16          8.48        1.2787    6   2   0        24
                77.38          9.94        1.2333    5   3   3        24
                85.81          1.29        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.