data_global
_amcsd_formula_title '(NH4)2BeF4'
loop_
_publ_author_name
'Hultgren R'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 88 
_journal_year 1934
_journal_page_first 233
_journal_page_last 237
_publ_section_title
;
 The crystal structure of ammonium beryllium fluoride, (NH4)2BeF4
;
_database_code_amcsd 0010535
_chemical_formula_sum 'N2 Be F4'
_cell_length_a 5.8
_cell_length_b 10.2
_cell_length_c 7.5
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 443.700
_exptl_crystal_density_diffrn      1.692
_symmetry_space_group_name_H-M 'P m c n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,y,z'
  '1/2+x,-y,-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2-x,1/2-y,1/2+z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
N1   0.25000   0.39300   0.67500
N2   0.25000  -0.32500  -0.04600
Be   0.25000   0.41700   0.26300
F1   0.25000   0.39000   0.05100
F2   0.25000   0.57300   0.30000
F3   0.02400   0.35300   0.35000