The material described by UF3 crystallizes in the trigonal P-3m1 space group. U(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar geometry to three equivalent U(1) atoms. In the second F site, F(2) is bonded in a linear geometry to two equivalent U(1) atoms. is represented by the CIF file [CIF]
data_UF3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.176
_cell_length_b   4.176
_cell_length_c   4.633
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   69.961
_cell_formula_units_Z   1
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
  U  U0  1  0.000  0.000  0.500  1.0
  F  F1  1  0.667  0.333  0.391  1.0
  F  F2  1  0.333  0.667  0.609  1.0
  F  F3  1  0.000  0.000  0.000  1.0
[/CIF]
.
The material described by UF3 crystallizes in the trigonal P-3m1 space group. U(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar geometry to three equivalent U(1) atoms. In the second F site, F(2) is bonded in a linear geometry to two equivalent U(1) atoms. is represented by the CIF file [CIF]
data_UF3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.176
_cell_length_b   4.176
_cell_length_c   4.633
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   69.961
_cell_formula_units_Z   1
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
  U  U0  1  0.000  0.000  0.500  1.0
  F  F1  1  0.667  0.333  0.391  1.0
  F  F2  1  0.333  0.667  0.609  1.0
  F  F3  1  0.000  0.000  0.000  1.0
[/CIF]
.