Na2 O6 Ta2
      Michel C, Groult D, Chailleux J, Raveau B
      Revue de Chimie Minerale 13 (1976) 283-289
      Sur de nouveaux pyrochlores lacunaires riches en sodium Na1+a Ta1+a
      W1-a O6 synthetises par echange carionique en phase solide
      _cod_database_code 1001030
      _database_code_amcsd 0015376

      CELL PARAMETERS:   10.4420  10.4420  10.4420   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1138.547
      Density (g/cm3):      5.878
      MAX. ABS. INTENSITY / VOLUME**2:      214.3715121    
      RIR:     11.875
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.69         56.15        6.0287    1   1   1         8
                28.35         31.81        3.1484    3   1   1        24
                29.64        100.00        3.0143    2   2   2         8
                34.35         32.65        2.6105    4   0   0         6
                37.55          5.97        2.3956    3   3   1        24
                45.12          4.17        2.0096    5   1   1        24
                45.12          5.20        2.0096    3   3   3         8
                49.37         40.85        1.8459    4   4   0        12
                51.80          9.72        1.7650    5   3   1        48
                57.91          4.14        1.5924    5   3   3        24
                58.64         36.09        1.5742    6   2   2        24
                61.53          8.95        1.5072    4   4   4         8
                63.64          3.80        1.4622    5   5   1        24
                63.64          2.04        1.4622    7   1   1        24
                69.09          5.00        1.3594    7   3   1        48
                69.09          1.32        1.3594    5   5   3        24
                72.40          4.89        1.3053    8   0   0         6
                79.49          1.96        1.2057    7   5   1        48
                80.13         11.81        1.1978    6   6   2        24
                82.65          9.96        1.1675    8   4   0        24
                84.54          1.40        1.1462    7   5   3        48
                89.54          1.76        1.0946    9   3   1        48
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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.