data_global
_chemical_name_mineral 'Barberiite'
loop_
_publ_author_name
'van Rensburg D J J'
'Boeyens J C A'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 5 
_journal_year 1972
_journal_page_first 79
_journal_page_last 84
_publ_section_title
;
 The crystal structure of ammonium tetrafluoroborate IV at 140 K
 Sample: T = 140 K
 Note: x(H2), y(H2) adjusted to match reported bond lengths
;
_database_code_amcsd 0013299
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'N H4 B F4'
_cell_length_a 7.243
_cell_length_b 8.808
_cell_length_c 5.908
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 376.909
_exptl_crystal_density_diffrn      1.848
_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
N   0.17140   0.18430   0.25000   0.00892
H1   0.13000   0.29000   0.25000   0.03800
H2   0.28900   0.19800   0.25000   0.03800
H3   0.10000   0.15000   0.08000   0.03800
B   0.69050   0.07220   0.25000   0.01549
F1   0.58220   0.94030   0.25000   0.03047
F2   0.57640   0.20190   0.25000   0.01990
F3   0.80600   0.07680   0.05270   0.01861