data_global
_chemical_name_mineral 'Bararite'
loop_
_publ_author_name
'Schlemper E O'
'Hamilton W C'
_journal_name_full 'Journal of Chemical Physics'
_journal_volume 45 
_journal_year 1966
_journal_page_first 408
_journal_page_last 409
_publ_section_title
;
 On the structure of trigonal ammonium fluorosilicate
;
_database_code_amcsd 0012988
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'N2 Si F6'
_cell_length_a 5.784
_cell_length_b 5.784
_cell_length_c 4.796
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 138.952
_exptl_crystal_density_diffrn      2.033
_symmetry_space_group_name_H-M 'P -3 m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-y,-x,z'
  'y,-x+y,-z'
  '-x,-x+y,-z'
  '-x+y,-x,z'
  '-x+y,y,z'
  '-x,-y,-z'
  'y,x,-z'
  '-y,x-y,z'
  'x,x-y,z'
  'x-y,x,-z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
NH4   0.33333   0.66667   0.33000
Si   0.00000   0.00000   0.00000
F   0.13900  -0.13900   0.79900