Chabazite-Na
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R061095
      Mazzi F, Galli E
      Neues Jahrbuch fur Mineralogie, Monatshefte 1983 (1983) 461-480
      The tetrahedral framework of chabazite
      Locality: Richmond, Melbourne, Victoria, Australia
      Note: Occupancies invented to match formula and refinement
      Sample: C 4a, trigonal refinement

      CELL PARAMETERS:   9.4200  9.4200  9.4200   94.270   94.270   94.270
      SPACE GROUP: R-3m      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Na     0.20890   0.20890   0.20890     0.150     3.900
            Ca     0.20890   0.20890   0.20890     0.110     3.900
            K      0.20890   0.20890   0.20890     0.040     3.900
            Na     0.57670   0.57670   0.21320     0.015     4.100
            Ca     0.57670   0.57670   0.21320     0.011     4.100
            K      0.57670   0.57670   0.21320     0.014     4.100
            Na     0.40300   0.40300   0.40300     0.120     7.900
            Ca     0.40300   0.40300   0.40300     0.080     7.900
            K      0.40300   0.40300   0.40300     0.030     7.900
            Na     0.50000   0.50000   0.00000     0.070    10.100
            Ca     0.50000   0.50000   0.00000     0.045    10.100
            K      0.50000   0.50000   0.00000     0.015    10.100
            Si     0.10338   0.33257  -0.12461     0.662     0.950
            Al     0.10338   0.33257  -0.12461     0.338     0.950
            O      0.26500  -0.26500   0.00000     1.000     2.700
            O      0.15040  -0.15040   0.50000     1.000     2.300
            O      0.25220   0.25220  -0.10820     1.000     2.500
            O      0.02320   0.02320   0.31720     1.000     2.500

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  8 +/-  8 +/-  8
            MAX. ABS. INTENSITY / VOLUME**2:      23.81529650    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                 9.45        100.00        9.3634    1   0   0
                12.82         20.49        6.9045    0  -1   1
                13.90          2.40        6.3697    1   1   0
                15.95         10.67        5.5570    1  -1   1
                17.68         13.49        5.0174    1   1   1
                18.96          1.82        4.6817    2   0   0
                20.52         28.95        4.3291    0  -1   2
                22.30          3.00        3.9863    1  -2   1
                22.95          2.65        3.8749    2  -1   1
                24.80          9.81        3.5895    2   1   1
                25.81          4.92        3.4522    0  -2   2
                28.02          1.25        3.1848    2   2   0
                30.48         14.00        2.9324   -1  -1   3
                30.62          3.15        2.9194    2   2   1
                30.92          6.50        2.8920    3   1   0
                33.32          1.71        2.6889    3   1   1
                34.36          4.43        2.6096    2  -3   1
                35.84          3.95        2.5056    3   2   0
                39.54          1.25        2.2794   -1  -1   4
                43.25          1.81        2.0919    4  -2   1
                47.48          1.50        1.9150    3  -4   1
                48.62          1.85        1.8727    5   0   0
                50.46          2.21        1.8085    5   1   0
                53.05          2.23        1.7261    0  -4   4
                54.07          1.26        1.6959    5  -1   2
                54.90          1.03        1.6725    3   3   3
                55.77          1.60        1.6484   -1  -3   5
                59.24          1.45        1.5598    0  -1   6
                66.39          1.01        1.4081    6   2   1
                68.79          1.11        1.3648    6  -3   2
                69.98          1.27        1.3444    6   2   2
                70.93          1.57        1.3288    3  -6   3
                79.86          1.08        1.2011    7  -1   3
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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.