Fluornatromicrolite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R130021
      Witzke T, Steins M, Doering T, Schuckmann W, Wegner R, Pollmann H
      The Canadian Mineralogist 49 (2011) 1105-1110
      Fluornatromicrolite, (Na,Ca,Bi)2Ta2O6F, a new mineral species
      from Quixaba, Paraiba, Brazil
      Locality: Quixaba, Paraiba, Brazil
      _database_code_amcsd 0018616

      CELL PARAMETERS:  10.4700 10.4700 10.4700   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: Fd3m      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Na     0.00000   0.00000   0.00000     0.555     3.000
            Ca     0.00000   0.00000   0.00000     0.325     3.000
            Bi     0.00000   0.00000   0.00000     0.075     3.000
            Ta     0.50000   0.50000   0.50000     1.000     1.176
            O     -0.18280   0.12500   0.12500     1.000     1.445
            F      0.12500   0.12500   0.12500     1.000     2.132

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  9 +/-  9 +/-  9
            MAX. ABS. INTENSITY / VOLUME**2:      251.9381918    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.65         61.36        6.0449    1   1   1
                28.27         42.73        3.1568    3   1   1
                29.56        100.00        3.0224    2   2   2
                34.26         31.70        2.6175    4   0   0
                37.44          7.37        2.4020    3   3   1
                44.99          6.73        2.0150    5   1   1
                44.99          6.87        2.0150    3   3   3
                49.23         40.95        1.8509    4   4   0
                51.65         12.14        1.7698    5   3   1
                57.74          6.10        1.5967    5   3   3
                58.47         36.27        1.5784    6   2   2
                61.35          9.13        1.5112    4   4   4
                63.45          4.73        1.4661    5   5   1
                63.45          2.99        1.4661    7   1   1
                68.88          7.07        1.3631    7   3   1
                68.88          2.28        1.3631    5   5   3
                72.18          5.02        1.3088    8   0   0
                74.13          1.00        1.2791    7   3   3
                79.24          3.19        1.2090    7   5   1
                79.87         12.08        1.2010    6   6   2
                82.38         10.20        1.1706    8   4   0
                84.26          1.41        1.1492    9   1   1
                84.26          2.29        1.1492    7   5   3
                89.24          2.99        1.0976    9   3   1
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.