American Mineralogist Crystal Structure Database

1 matching records for this search.

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
6.0403 6.0403 3.5899 90 90 120 P6_3/m
atom     x     y    z  occ  B(1,1)  B(2,2)  B(3,3)  B(1,2) B(1,3) B(2,3)
Na1      0     0 .962 .189 .008040 .008040 .028710 .004020      0      0
Na2      0     0 .284 .090 .005573 .005573 .025218 .002741      0      0
Ca     2/3   1/3  .25 .498 .005573 .005573 .012221 .002832      0      0
Eu     2/3   1/3  .25 .299 .005573 .005573 .012221 .002832      0      0
Y      2/3   1/3  .25 .198 .005573 .005573 .012221 .002832      0      0
F    .3089 .3932  .25      .009136 .009776 .025606 .005299      0      0
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