Al2.66 O4
      Shirasuka K, Yanagida H, Yamaguchi G
      Yogyo Kyokai Shi 84 (1976) 610-613
      The preparation of eta alumina and its structure
      _cod_database_code 1200015
      _database_code_amcsd 0018290

      CELL PARAMETERS:    7.9060   7.9060   7.9060   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    494.163
      Density (g/cm3):      3.656
      MAX. ABS. INTENSITY / VOLUME**2:      12.56715165    
      RIR:      1.119
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.45          4.47        4.5645    1   1   1         8
                32.02          6.15        2.7952    2   2   0        12
                37.74         29.93        2.3837    3   1   1        24
                39.48          8.07        2.2823    2   2   2         8
                45.91         70.98        1.9765    4   0   0         6
                57.07          1.88        1.6138    4   2   2        24
                60.89          2.74        1.5215    5   1   1        24
                60.89          3.91        1.5215    3   3   3         8
                66.95        100.00        1.3976    4   4   0        12
                79.50          2.64        1.2057    5   3   3        24
                85.00          7.82        1.1411    4   4   4         8
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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.