Neltnerite
      de Villiers J P R, Dobson S M, Buseck P R
      European Journal of Mineralogy 3 (1991) 567-573
      Refinement of the crystal structure of neltnerite,
      a member of the bixbyite-braunite group of minerals
      _database_code_amcsd 0006420

      CELL PARAMETERS:    9.4680   9.4680  18.8620   90.000   90.000   90.000
      SPACE GROUP: I4_1/acd  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1690.847
      Density (g/cm3):      4.639
      MAX. ABS. INTENSITY / VOLUME**2:      75.83274257    
      RIR:      5.323
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.74          3.76        4.7340    2   0   0         4
                18.82          1.33        4.7155    0   0   4         2
                25.36          4.19        3.5120    2   1   3        16
                32.81        100.00        2.7296    2   2   4         8
                38.02         12.50        2.3670    4   0   0         4
                38.17          5.56        2.3577    0   0   8         2
                41.59          2.02        2.1717    3   3   2         8
                41.66          2.70        2.1681    3   1   6        16
                41.92          5.75        2.1552    3   2   5        16
                47.05          1.24        1.9314    4   2   4        16
                48.30          1.91        1.8841    4   3   1        16
                52.35          1.55        1.7478    4   1   7        16
                54.85         12.76        1.6737    4   4   0         4
                54.97         30.90        1.6704    4   0   8         8
                59.74          1.95        1.5480    4   1   9        16
                61.36          2.06        1.5109    6   1   3        16
                63.06          1.47        1.4741    5   4   1        16
                65.41         17.50        1.4268    6   2   4        16
                65.62         10.49        1.4228    2   2  12         8
                68.78          5.23        1.3648    4   4   8         8
                81.29          2.18        1.1835    8   0   0         4
                81.68          1.98        1.1789    0   0  16         2
                82.25          1.00        1.1721    8   1   1        16
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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.