data_global
_amcsd_formula_title 'NH4AlF4'
loop_
_publ_author_name
'Bulou A'
'Leble A'
'Hewat A'
_journal_name_full 'Materials Research Bulletin'
_journal_volume 17 
_journal_year 1982
_journal_page_first 391
_journal_page_last 397
_publ_section_title
;
 NH4AlF4: Determination of the Ordered and Disordered Structures by
 Neutron Powder Profile Refinement
 _cod_database_code 1000183
;
_database_code_amcsd 0014296
_chemical_formula_sum 'N H4 Al F4'
_cell_length_a 5.0564
_cell_length_b 5.0564
_cell_length_c 12.7113
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 324.992
_exptl_crystal_density_diffrn      2.473
_symmetry_space_group_name_H-M 'P 42/m b c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-y,1/2-x,1/2+z'
  '1/2+y,1/2+x,1/2-z'
  'y,-x,1/2-z'
  '-y,x,1/2+z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-z'
  'x,y,-z'
  '-x,-y,z'
  '1/2+y,1/2+x,1/2+z'
  '1/2-y,1/2-x,1/2-z'
  '-y,x,1/2-z'
  'y,-x,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
N1   0.00000   0.00000   0.25000
H1   0.00170   0.83100   0.20300
Al1   0.00000   0.50000   0.00000
F1   0.00000   0.50000   0.13940
F2   0.29570   0.29800   0.00000