data_global
_amcsd_formula_title 'Na.22K.78MgF3'
loop_
_publ_author_name
'Chakhmouradian A R'
'Ross K'
'Mitchell R H'
'Swainson I'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 28 
_journal_year 2001
_journal_page_first 277
_journal_page_last 284
_publ_section_title
;
 The crystal chemistry of synthetic potassium-bearing neighborite, (Na1-xKx)MgF3
 Sample x = .78
;
_database_code_amcsd 0008549
_chemical_formula_sum '(Na.22 K.78) Mg F3'
_cell_length_a 3.9742
_cell_length_b 3.9742
_cell_length_c 3.9742
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 62.770
_exptl_crystal_density_diffrn      3.091
_symmetry_space_group_name_H-M 'P m 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'z,-x,y'
  '-y,z,-x'
  'x,-y,z'
  '-z,x,-y'
  'y,-z,x'
  '-x,y,-z'
  'x,-z,-y'
  '-z,y,x'
  'y,-x,-z'
  '-x,z,y'
  'z,-y,-x'
  '-y,x,z'
  'x,z,y'
  '-z,-y,-x'
  'y,x,z'
  '-x,-z,-y'
  'z,y,x'
  '-y,-x,-z'
  'z,x,-y'
  '-y,-z,x'
  'x,y,-z'
  '-z,-x,y'
  'y,z,-x'
  '-x,-y,z'
  '-z,x,y'
  'y,-z,-x'
  '-x,y,z'
  'z,-x,-y'
  '-y,z,x'
  'x,-y,-z'
  '-x,z,-y'
  'z,-y,x'
  '-y,x,-z'
  'x,-z,y'
  '-z,y,-x'
  'y,-x,z'
  '-x,-z,y'
  'z,y,-x'
  '-y,-x,z'
  'x,z,-y'
  '-z,-y,x'
  'y,x,-z'
  '-z,-x,-y'
  'y,z,x'
  '-x,-y,-z'
  'z,x,y'
  '-y,-z,-x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Na   0.50000   0.50000   0.50000   0.22000
K   0.50000   0.50000   0.50000   0.78000
Mg   0.00000   0.00000   0.00000   1.00000
F   0.50000   0.00000   0.00000   1.00000