Townendite
      Grey I E, Macrae C M, Mumme W G, Pring A
      American Mineralogist 95 (2010) 646-650
      Townendite, Na8ZrSi6O18, a new uranium-bearing lovozerite group mineral
      from the Ilimaussaq alkaline complex, Southern Greenland
      Locality: the Ilimaussaq alkaline complex, Southern Greenland
      _database_code_amcsd 0005045

      CELL PARAMETERS:   10.3450  10.3450  13.1030   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1214.402
      Density (g/cm3):      2.910
      MAX. ABS. INTENSITY / VOLUME**2:      10.06053657    
      RIR:      1.126
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                11.97         31.33        7.3956    1   0   1         6
                16.76         20.86        5.2884    0   1   2         6
                17.14          3.05        5.1725    1   1   0         6
                20.33          2.95        4.3677    0   0   3         2
                20.96         23.33        4.2387    0   2   1         6
                24.07         43.04        3.6978    2   0   2         6
                26.71         43.42        3.3371    1   1   3        12
                27.20         82.17        3.2785    2   1   1        12
                29.70          8.32        3.0081    1   2   2        12
                33.90        100.00        2.6442    0   2   4         6
                34.69         96.01        2.5863    2   2   0         6
                35.70          1.30        2.5152    0   1   5         6
                36.45          1.23        2.4652    0   3   3         6
                38.23          3.33        2.3544    2   1   4        12
                38.76          3.37        2.3233    3   1   2        12
                39.85         10.63        2.2620    2   0   5         6
                40.54          1.41        2.2254    2   2   3        12
                40.88          1.14        2.2077    4   0   1         6
                41.34          1.26        2.1838    0   0   6         2
                42.66         11.17        2.1193    0   4   2         6
                43.68         10.15        2.0725    1   2   5        12
                45.84          9.57        1.9797    1   3   4        12
                46.45          2.35        1.9550    4   1   0        12
                49.29         58.17        1.8489    4   0   4         6
                49.76          2.11        1.8323    1   0   7         6
                50.62          2.49        1.8031    3   1   5        12
                51.19         11.99        1.7844    1   4   3        12
                51.48          8.14        1.7753    0   5   1         6
                53.02          2.30        1.7271    0   2   7         6
                53.12          6.43        1.7242    3   3   0         6
                53.84          2.71        1.7026    0   4   5         6
                54.66          3.53        1.6791    2   4   1        12
                56.14          7.97        1.6382    2   1   7        12
                56.94          4.45        1.6173    2   3   5        12
                57.46          6.23        1.6037    3   3   3        12
                57.72          3.63        1.5971    5   1   1        12
                59.12          1.19        1.5626    1   5   2        12
                60.15         13.62        1.5383    2   0   8         6
                61.67         21.24        1.5041    2   4   4        12
                62.17          8.25        1.4932    6   0   0         6
                63.05          1.40        1.4745    1   2   8        12
                63.57          6.55        1.4636    4   3   1        12
                63.91          1.84        1.4566    4   1   6        12
                63.95          2.00        1.4559    0   0   9         2
                65.65          1.85        1.4221    4   2   5        12
                66.75          1.13        1.4014    1   1   9        12
                67.70          6.56        1.3839    3   2   7        12
                68.63          1.31        1.3675    3   1   8        12
                68.89          7.29        1.3630    5   2   3        12
                71.34          8.06        1.3221    0   4   8         6
                73.19         10.47        1.2931    4   4   0         6
                73.80          1.18        1.2840    3   4   5        12
                74.84          4.00        1.2687    2   2   9        12
                75.38          1.24        1.2610    1   6   4        12
                77.11          1.67        1.2368    6   2   1        12
                79.04          2.98        1.2115    6   1   5        12
                79.24          1.43        1.2089    5   0   8         6
                81.82          6.25        1.1772    4   2   8        12
                83.16          7.52        1.1617    6   2   4        12
                86.64          2.02        1.1237    1   2  11        12
                86.74          1.26        1.1226    2   6   5        12
                87.74          1.64        1.1124    3   3   9        12
                88.63          2.45        1.1036    1   6   7        12
                89.49          1.56        1.0952    3   4   8        12
                89.82          1.18        1.0919    0   0  12         2
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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.