Perovskite niobian
      Barth T
      Norsk Geologisk Tidsskrift 8 (1925) 201-216
      Die Kristallstruktur von Perowskit und verwandter Verbindungen
      _cod_database_code 1011212
      _database_code_amcsd 0018081

      CELL PARAMETERS:    3.8250   3.8250   3.8250   90.000   90.000   90.000
      SPACE GROUP: Pm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     55.962
      Density (g/cm3):      4.282
      MAX. ABS. INTENSITY / VOLUME**2:      63.03087593    
      RIR:      4.793
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.25         36.15        3.8250    1   0   0         6
                33.12        100.00        2.7047    1   1   0        12
                40.86          2.58        2.2084    1   1   1         8
                47.54         49.50        1.9125    2   0   0         6
                53.57         11.05        1.7106    2   1   0        24
                59.17         30.68        1.5615    2   1   1        24
                69.51         22.67        1.3523    2   2   0        12
                74.41          3.45        1.2750    2   2   1        24
                79.19         10.97        1.2096    3   1   0        24
                88.56          6.44        1.1042    2   2   2         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.