Gagarinite-(Eu)
      Frank-Kamenetskaya O V, Fundamenskii V S, Tsytsenko A K, Frank-Kamenetskii V A
      Crystallography Reports 39 (1994) 923-928
      Crystal structure of gagarinite from precision X-ray data:
      Structural changes in the NaCaTRF6-Na1.5TR1.5F6 series
      Locality: ultra-alkaline rare-metal feldspar pegmatites from eastern Siberia
      _database_code_amcsd 0012345

      CELL PARAMETERS:    6.0403   6.0403   3.5899   90.000   90.000  120.000
      SPACE GROUP: P6_3/m    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    113.431
      Density (g/cm3):      4.474
      MAX. ABS. INTENSITY / VOLUME**2:      40.11433608    
      RIR:      2.920
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.95         75.26        5.2311    1   0   0         6
                29.58         90.74        3.0201    1   1   0         6
                30.19         97.46        2.9599    1   0   1        12
                34.28          9.07        2.6155    2   0   0         6
                38.97         22.98        2.3111    1   1   1        12
                42.78        100.00        2.1140    2   0   1        12
                45.90         10.49        1.9772    1   2   0         6
                50.87         18.75        1.7950    0   0   2         2
                52.48         41.48        1.7437    3   0   0         6
                52.86         48.65        1.7319    1   2   1        12
                52.86         30.00        1.7319    2   1   1        12
                54.01         13.62        1.6978    1   0   2        12
                59.95         14.65        1.5430    1   1   2        12
                61.40         12.11        1.5101    2   2   0         6
                62.79          6.80        1.4800    2   0   2        12
                64.20          3.15        1.4508    1   3   0         6
                69.94          9.89        1.3451    3   1   1        12
                69.94          5.16        1.3451    1   3   1        12
                70.91          7.98        1.3290    1   2   2        12
                72.24          2.45        1.3078    4   0   0         6
                76.11         16.70        1.2507    3   0   2        12
                77.72          2.77        1.2288    4   0   1        12
                82.73          5.19        1.1665    1   0   3        12
                83.70          6.45        1.1555    2   2   2        12
                84.96          1.75        1.1415    4   1   0         6
                84.96          2.54        1.1415    1   4   0         6
                85.27          2.04        1.1382    2   3   1        12
                85.27          4.61        1.1382    3   2   1        12
                86.19          4.16        1.1283    1   3   2        12
                86.19          1.91        1.1283    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.