Fluornatromicrolite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R070365
      Andrade M B, Atencio D, Menezes L A D, Ellena J
      The Canadian Mineralogist 49 (2011) 615-621
      The crystal structure of a microlite-group mineral with a formula near NaCaTa2O6F
      from the Morro Redondo mine, Coronel Murta, Minas Gerias, Brazil
      Locality: Morro Redondo mine, Coronel Murta, Minas Gerias, Brazil
      _database_code_amcsd 0018462

      CELL PARAMETERS:  10.4100 10.4100 10.4100   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: Fd3m      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Na     0.50000   0.50000   0.50000     0.440     1.429
            Ca     0.50000   0.50000   0.50000     0.440     1.429
            Pb     0.50000   0.50000   0.50000     0.010     1.429
            Ta     0.00000   0.00000   0.00000     0.850     0.995
            Nb     0.00000   0.00000   0.00000     0.070     0.995
            Si     0.00000   0.00000   0.00000     0.060     0.995
            As     0.00000   0.00000   0.00000     0.020     0.995
            O      0.06840   0.37500   0.37500     0.960     1.634
            OH     0.06840   0.37500   0.37500     0.040     1.634
            F      0.37500   0.37500   0.37500     0.730     1.026

            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:      200.7362065    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.74         75.11        6.0102    1   1   1
                28.44         47.71        3.1387    3   1   1
                29.73        100.00        3.0051    2   2   2
                34.46         31.23        2.6025    4   0   0
                37.66          8.95        2.3882    3   3   1
                45.26          7.38        2.0034    5   1   1
                45.26          7.61        2.0034    3   3   3
                49.53         42.28        1.8402    4   4   0
                51.97         14.08        1.7596    5   3   1
                58.11          6.69        1.5875    5   3   3
                58.84         37.82        1.5694    6   2   2
                61.74          9.52        1.5026    4   4   4
                63.86          3.35        1.4577    7   1   1
                63.86          5.36        1.4577    5   5   1
                69.34          7.85        1.3553    7   3   1
                69.34          2.50        1.3553    5   5   3
                72.66          5.38        1.3012    8   0   0
                74.63          1.13        1.2718    7   3   3
                79.78          3.55        1.2020    7   5   1
                80.42         13.23        1.1941    6   6   2
                82.96         11.23        1.1639    8   4   0
                84.86          2.55        1.1426    7   5   3
                84.86          1.59        1.1426    9   1   1
                89.89          3.28        1.0913    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.