Gahnite
      Fregola R A, Skogby H, Bosi F, D'Ippolito V, Andreozzi G B, Halenius U
      American Mineralogist 99 (2014) 2187-2195
      Optical absorption spectroscopy study of the causes for color variations in natural
      Fe-bearing gahnite: Insights from iron valency and site distribution data
      Note: Sample Ni8967e
      Locality: Jemaa, Kaduna, Nigeria
      _database_code_amcsd 0020409

      CELL PARAMETERS:    8.0954   8.0954   8.0954   90.000   90.000   90.000
      SPACE GROUP: Fd-3m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    530.536
      Density (g/cm3):      4.576
      MAX. ABS. INTENSITY / VOLUME**2:      56.98665372    
      RIR:      4.055
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.99          4.34        4.6739    1   1   1         8
                31.25         75.93        2.8622    2   2   0        12
                36.82        100.00        2.4409    3   1   1        24
                44.78          4.51        2.0238    4   0   0         6
                49.05          9.38        1.8572    3   3   1        24
                55.62         24.16        1.6525    4   2   2        24
                59.32          4.41        1.5580    3   3   3         8
                59.32         36.15        1.5580    5   1   1        24
                65.19         44.64        1.4311    4   4   0        12
                68.58          1.20        1.3684    5   3   1        48
                74.07          8.46        1.2800    6   2   0        24
                77.29         10.20        1.2345    5   3   3        24
                85.70          1.28        1.1336    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.