Mn4 Nb2 O9
      Bertaut F, Corliss L, Forrat F
      Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences 251 (1960) 1733-1735
      Structure cristallographique et magnetique de niobates et tantalates de
      metaux de transition bivalents.
      _cod_database_code 1008924
      _database_code_amcsd 0016791

      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):      5.549
      MAX. ABS. INTENSITY / VOLUME**2:      87.36001231    
      RIR:      5.126
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.50          1.56        7.0840    0   0   2         2
                19.80         19.47        4.4834    1   0   0         6
                23.48         14.78        3.7884    0   1   2         6
                32.21          9.30        2.7793    0   1   4         6
                32.21         90.70        2.7793    1   0   4         6
                34.65         65.62        2.5885    1   1   0         6
                39.71         10.26        2.2699    1   1   3        12
                43.31          1.96        2.0893    1   0   6         6
                48.03         31.95        1.8942    0   2   4         6
                48.03          1.72        1.8942    2   0   4         6
                52.45         24.60        1.7445    1   1   6        12
                54.12          1.48        1.6946    2   1   0        12
                55.78          1.42        1.6481    1   2   2        12
                55.81          9.58        1.6472    0   1   8         6
                56.61          1.59        1.6258    0   2   6         6
                60.57          2.44        1.5286    1   2   4        12
                60.57         25.99        1.5286    2   1   4        12
                62.11         21.80        1.4945    3   0   0         6
                63.66          1.83        1.4616    1   1   8        12
                67.39          3.85        1.3897    2   0   8         6
                68.11          1.22        1.3767    2   1   6        12
                69.59          1.68        1.3510    0   1  10         6
                69.59          5.88        1.3510    1   0  10         6
                73.12          6.36        1.2943    2   2   0         6
                78.05          5.29        1.2244    1   2   8        12
                80.14          3.09        1.1977    0   2  10         6
                80.14          1.31        1.1977    2   0  10         6
                82.15          1.06        1.1733    3   1   4        12
                82.15          7.97        1.1733    1   3   4        12
                85.57          3.97        1.1350    2   2   6        12
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.