data_global
_chemical_name_mineral 'Neighborite'
loop_
_publ_author_name
'Zhao Y S'
'Parise J B'
'Wang Y'
'Kusaba K'
'Vaughan M T'
'Weidner D J'
'Kikegawa T'
'Chen J'
'Shimomura O'
_journal_name_full 'American Mineralogist'
_journal_volume 79 
_journal_year 1994
_journal_page_first 615
_journal_page_last 621
_publ_section_title
;
 High-pressure crystal chemistry of neighborite, NaMgF3: an angle-dispersive
 diffraction study using monochromatic synchrotron X-radiation
 P = room pressure following decompression
;
_database_code_amcsd 0001666
_chemical_formula_sum 'Na Mg F3'
_cell_length_a 5.3609
_cell_length_b 5.4828
_cell_length_c 7.667
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 225.354
_exptl_crystal_density_diffrn      3.074
_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   0.98600   0.04220   0.25000   0.04100
Mg   0.00000   0.50000   0.00000   0.03100
F1   0.09120   0.47110   0.25000   0.03500
F2   0.70520   0.29430   0.04550   0.02700