Fluornatromicrolite
      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:   10.4396  10.4396  10.4396   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1137.762
      Density (g/cm3):      5.751
      MAX. ABS. INTENSITY / VOLUME**2:      198.8762352    
      RIR:     11.259
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.70         75.01        6.0273    1   1   1         8
                28.35         47.70        3.1477    3   1   1        24
                29.64        100.00        3.0137    2   2   2         8
                34.36         31.23        2.6099    4   0   0         6
                37.55          8.94        2.3950    3   3   1        24
                45.13          7.39        2.0091    5   1   1        24
                45.13          7.62        2.0091    3   3   3         8
                49.38         42.38        1.8455    4   4   0        12
                51.81         14.11        1.7646    5   3   1        48
                57.93          6.71        1.5920    5   3   3        24
                58.66         37.93        1.5738    6   2   2        24
                61.54          9.54        1.5068    4   4   4         8
                63.65          3.35        1.4618    7   1   1        24
                63.65          5.38        1.4618    5   5   1        24
                69.11          7.87        1.3591    7   3   1        48
                69.11          2.50        1.3591    5   5   3        24
                72.42          5.40        1.3049    8   0   0         6
                74.38          1.13        1.2754    7   3   3        24
                79.51          3.56        1.2055    7   5   1        48
                80.15         13.27        1.1975    6   6   2        24
                82.68         11.25        1.1672    8   4   0        24
                84.56          2.55        1.1459    7   5   3        48
                84.56          1.59        1.1459    9   1   1        24
                89.57          3.28        1.0944    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.