Co4 Nb2 O9
      Bertaut E, Corliss L, Forrat F, Aleonard R, Pauthenet R
      Journal of Physics and Chemistry of Solids 21 (1961) 234-251
      Etude de niobates et tantalates de metaux transition bivalents
      _cod_database_code 1008215
      _database_code_amcsd 0016153

      CELL PARAMETERS:    5.1770   5.1770  14.1680   90.000   90.000  120.000
      SPACE GROUP: P-3c1     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    328.848
      Density (g/cm3):      5.711
      MAX. ABS. INTENSITY / VOLUME**2:      96.63022513    
      RIR:      5.510
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.80         13.21        4.4834    1   0   0         6
                23.48         13.04        3.7884    0   1   2         6
                25.14          1.52        3.5420    0   0   4         2
                32.21          2.66        2.7793    0   1   4         6
                32.21         97.34        2.7793    1   0   4         6
                34.65         67.91        2.5885    1   1   0         6
                38.11          1.02        2.3613    0   0   6         2
                39.71          9.36        2.2699    1   1   3        12
                43.29          1.95        2.0899    1   1   4        12
                48.03         33.77        1.8942    0   2   4         6
                52.45         23.93        1.7445    1   1   6        12
                55.78          1.36        1.6481    1   2   2        12
                55.81         11.92        1.6472    0   1   8         6
                60.57         27.84        1.5286    2   1   4        12
                62.11         22.00        1.4945    3   0   0         6
                67.39          5.11        1.3897    2   0   8         6
                69.59          6.64        1.3510    1   0  10         6
                73.12          6.62        1.2943    2   2   0         6
                78.05          6.82        1.2244    1   2   8        12
                80.14          3.57        1.1977    0   2  10         6
                82.15          8.75        1.1733    1   3   4        12
                85.57          3.89        1.1350    2   2   6        12
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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.