data_global
_chemical_name_mineral 'Neighborite'
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 studied by X-ray diffraction
;
_database_code_amcsd 0008540
_chemical_formula_sum 'Na Mg F3'
_cell_length_a 5.3607
_cell_length_b 5.4873
_cell_length_c 7.6662
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 225.507
_exptl_crystal_density_diffrn      3.072
_symmetry_space_group_name_H-M 'P b n m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na   0.98950   0.04410   0.25000   0.02394
Mg   0.00000   0.50000   0.00000   0.01127
F1   0.08970   0.47220   0.25000   0.01482
F2   0.70280   0.29640   0.04760   0.01520