Gagarinite-(Y)
      Hughes J M, Drexler J W
      The Canadian Mineralogist 32 (1994) 563-565
      Refinement of the structure of gagarinite-(Y), Nax(CaxREE2-x)F6
      _database_code_amcsd 0005407

      CELL PARAMETERS:    5.9870   5.9870   3.5413   90.000   90.000  120.000
      SPACE GROUP: P6_3/m    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    109.929
      Density (g/cm3):      4.096
      MAX. ABS. INTENSITY / VOLUME**2:      37.30481049    
      RIR:      2.966
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.10        100.00        5.1849    1   0   0         6
                29.85         76.46        2.9935    1   1   0         6
                30.57         95.58        2.9243    1   0   1        12
                34.60         12.56        2.5924    2   0   0         6
                39.41         18.44        2.2861    1   1   1        12
                43.25         89.93        2.0918    2   0   1        12
                46.33         11.68        1.9597    1   2   0         6
                51.62         15.04        1.7707    0   0   2         2
                52.98         33.08        1.7283    3   0   0         6
                53.44         42.83        1.7147    1   2   1        12
                53.44         27.63        1.7147    2   1   1        12
                54.78         13.50        1.6756    1   0   2        12
                60.78         13.04        1.5240    1   1   2        12
                62.00          9.87        1.4967    2   2   0         6
                63.64          6.76        1.4622    2   0   2        12
                64.84          3.37        1.4380    1   3   0         6
                64.84          1.24        1.4380    3   1   0         6
                70.71          9.11        1.3324    3   1   1        12
                70.71          5.35        1.3324    1   3   1        12
                71.86          7.05        1.3138    1   2   2        12
                72.99          2.48        1.2962    4   0   0         6
                77.12         13.26        1.2368    3   0   2        12
                78.59          3.12        1.2172    4   0   1        12
                84.10          4.80        1.1510    1   0   3        12
                84.82          5.67        1.1431    2   2   2        12
                85.90          1.37        1.1314    4   1   0         6
                85.90          1.90        1.1314    1   4   0         6
                86.27          3.59        1.1276    3   2   1        12
                86.27          1.82        1.1276    2   3   1        12
                87.36          3.53        1.1163    1   3   2        12
                87.36          1.91        1.1163    3   1   2        12
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.