data_global
_chemical_name_mineral 'Gagarinite-(Eu)'
loop_
_publ_author_name
'Frank-Kamenetskaya O V'
'Fundamenskii V S'
'Tsytsenko A K'
'Frank-Kamenetskii V A'
_journal_name_full 'Crystallography Reports'
_journal_volume 39 
_journal_year 1994
_journal_page_first 923
_journal_page_last 928
_publ_section_title
;
 Crystal structure of gagarinite from precision X-ray data:
 Structural changes in the NaCaTRF6-Na1.5TR1.5F6 series
;
_database_code_amcsd 0012345
_chemical_compound_source 'ultra-alkaline rare-metal feldspar pegmatites from eastern Siberia'
_chemical_formula_sum 'Na.558 Ca.498 Eu.299 Y.198 F3'
_cell_length_a 6.0403
_cell_length_b 6.0403
_cell_length_c 3.5899
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 113.431
_exptl_crystal_density_diffrn      4.474
_symmetry_space_group_name_H-M 'P 63/m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x-y,x,-z'
  '-x+y,-x,z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Na1   0.00000   0.00000   0.96200   0.18900
Na2   0.00000   0.00000   0.28400   0.09000
Ca   0.66667   0.33333   0.25000   0.49800
Eu   0.66667   0.33333   0.25000   0.29900
Y   0.66667   0.33333   0.25000   0.19800
F   0.30890   0.39320   0.25000   1.00000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Na1 0.01115 0.01115 0.01874 0.00557 0.00000 0.00000
Na2 0.00773 0.00773 0.01646 0.00380 0.00000 0.00000
Ca 0.00773 0.00773 0.00798 0.00393 0.00000 0.00000
Eu 0.00773 0.00773 0.00798 0.00393 0.00000 0.00000
Y 0.00773 0.00773 0.00798 0.00393 0.00000 0.00000
F 0.01266 0.01355 0.01672 0.00735 0.00000 0.00000