The material structure described by NH4F crystallizes in the hexagonal P6_3mc space group. N(1) is bonded to one H(2) and three equivalent H(1) atoms to form NH4 tetrahedra that share corners with four equivalent F(1)H4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) and one F(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) and one F(1) atom. F(1) is bonded to one H(2) and three equivalent H(1) atoms to form distorted FH4 tetrahedra that share corners with four equivalent N(1)H4 tetrahedra. is represented by the CIF file [CIF]
data_H4NF
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.408
_cell_length_b   4.408
_cell_length_c   7.136
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   120.067
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  H  H0  1  0.538  0.076  0.923  1.0
  H  H1  1  0.538  0.462  0.923  1.0
  H  H2  1  0.333  0.667  0.229  1.0
  H  H3  1  0.667  0.333  0.729  1.0
  H  H4  1  0.462  0.538  0.423  1.0
  H  H5  1  0.924  0.462  0.923  1.0
  H  H6  1  0.462  0.924  0.423  1.0
  H  H7  1  0.076  0.538  0.423  1.0
  N  N8  1  0.333  0.667  0.375  1.0
  N  N9  1  0.667  0.333  0.875  1.0
  F  F10  1  0.333  0.667  0.998  1.0
  F  F11  1  0.667  0.333  0.498  1.0
[/CIF]
.
The material structure described by NH4F crystallizes in the hexagonal P6_3mc space group. N(1) is bonded to one H(2) and three equivalent H(1) atoms to form NH4 tetrahedra that share corners with four equivalent F(1)H4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) and one F(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) and one F(1) atom. F(1) is bonded to one H(2) and three equivalent H(1) atoms to form distorted FH4 tetrahedra that share corners with four equivalent N(1)H4 tetrahedra. is represented by the CIF file [CIF]
data_H4NF
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.408
_cell_length_b   4.408
_cell_length_c   7.136
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   120.067
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  H  H0  1  0.538  0.076  0.923  1.0
  H  H1  1  0.538  0.462  0.923  1.0
  H  H2  1  0.333  0.667  0.229  1.0
  H  H3  1  0.667  0.333  0.729  1.0
  H  H4  1  0.462  0.538  0.423  1.0
  H  H5  1  0.924  0.462  0.923  1.0
  H  H6  1  0.462  0.924  0.423  1.0
  H  H7  1  0.076  0.538  0.423  1.0
  N  N8  1  0.333  0.667  0.375  1.0
  N  N9  1  0.667  0.333  0.875  1.0
  F  F10  1  0.333  0.667  0.998  1.0
  F  F11  1  0.667  0.333  0.498  1.0
[/CIF]
.