The material structure described by UF4 crystallizes in the monoclinic C2/c space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one F(1), one F(2), one F(3), one F(4), one F(5), one F(6), and two equivalent F(7) atoms. In the second U site, U(2) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(5), and two equivalent F(6) atoms. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the second F site, F(2) is bonded in a linear geometry to one U(1) and one U(2) atom. In the third F site, F(3) is bonded in a linear geometry to two equivalent U(1) atoms. In the fourth F site, F(4) is bonded in a linear geometry to two equivalent U(1) atoms. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the sixth F site, F(6) is bonded in a linear geometry to one U(1) and one U(2) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms. is represented by the CIF file [CIF]
data_UF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.382
_cell_length_b   8.382
_cell_length_c   8.389
_cell_angle_alpha   63.024
_cell_angle_beta   63.024
_cell_angle_gamma   79.899
_symmetry_Int_Tables_number   1
_cell_volume   467.794
_cell_formula_units_Z   6
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  0.225  0.368  0.328  1.0
  U  U1  1  0.632  0.775  0.172  1.0
  U  U2  1  0.775  0.632  0.672  1.0
  U  U3  1  0.368  0.225  0.828  1.0
  U  U4  1  0.212  0.788  0.750  1.0
  U  U5  1  0.788  0.212  0.250  1.0
  F  F6  1  0.729  0.025  0.152  1.0
  F  F7  1  0.975  0.271  0.348  1.0
  F  F8  1  0.271  0.975  0.848  1.0
  F  F9  1  0.025  0.729  0.652  1.0
  F  F10  1  0.503  0.251  0.294  1.0
  F  F11  1  0.749  0.497  0.206  1.0
  F  F12  1  0.500  0.000  0.000  1.0
  F  F13  1  0.000  0.500  0.500  1.0
  F  F14  1  0.401  0.599  0.250  1.0
  F  F15  1  0.599  0.401  0.750  1.0
  F  F16  1  0.810  0.400  0.925  1.0
  F  F17  1  0.600  0.190  0.575  1.0
  F  F18  1  0.190  0.600  0.075  1.0
  F  F19  1  0.400  0.810  0.425  1.0
  F  F20  1  0.070  0.180  0.044  1.0
  F  F21  1  0.820  0.930  0.456  1.0
  F  F22  1  0.930  0.820  0.956  1.0
  F  F23  1  0.180  0.070  0.544  1.0
  F  F24  1  0.675  0.741  0.894  1.0
  F  F25  1  0.259  0.325  0.606  1.0
  F  F26  1  0.325  0.259  0.106  1.0
  F  F27  1  0.741  0.675  0.394  1.0
  F  F28  1  0.251  0.503  0.794  1.0
  F  F29  1  0.497  0.749  0.706  1.0
[/CIF]
.
The material structure described by UF4 crystallizes in the monoclinic C2/c space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one F(1), one F(2), one F(3), one F(4), one F(5), one F(6), and two equivalent F(7) atoms. In the second U site, U(2) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(5), and two equivalent F(6) atoms. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the second F site, F(2) is bonded in a linear geometry to one U(1) and one U(2) atom. In the third F site, F(3) is bonded in a linear geometry to two equivalent U(1) atoms. In the fourth F site, F(4) is bonded in a linear geometry to two equivalent U(1) atoms. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one U(1) and one U(2) atom. In the sixth F site, F(6) is bonded in a linear geometry to one U(1) and one U(2) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms. is represented by the CIF file [CIF]
data_UF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.382
_cell_length_b   8.382
_cell_length_c   8.389
_cell_angle_alpha   63.024
_cell_angle_beta   63.024
_cell_angle_gamma   79.899
_symmetry_Int_Tables_number   1
_cell_volume   467.794
_cell_formula_units_Z   6
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  0.225  0.368  0.328  1.0
  U  U1  1  0.632  0.775  0.172  1.0
  U  U2  1  0.775  0.632  0.672  1.0
  U  U3  1  0.368  0.225  0.828  1.0
  U  U4  1  0.212  0.788  0.750  1.0
  U  U5  1  0.788  0.212  0.250  1.0
  F  F6  1  0.729  0.025  0.152  1.0
  F  F7  1  0.975  0.271  0.348  1.0
  F  F8  1  0.271  0.975  0.848  1.0
  F  F9  1  0.025  0.729  0.652  1.0
  F  F10  1  0.503  0.251  0.294  1.0
  F  F11  1  0.749  0.497  0.206  1.0
  F  F12  1  0.500  0.000  0.000  1.0
  F  F13  1  0.000  0.500  0.500  1.0
  F  F14  1  0.401  0.599  0.250  1.0
  F  F15  1  0.599  0.401  0.750  1.0
  F  F16  1  0.810  0.400  0.925  1.0
  F  F17  1  0.600  0.190  0.575  1.0
  F  F18  1  0.190  0.600  0.075  1.0
  F  F19  1  0.400  0.810  0.425  1.0
  F  F20  1  0.070  0.180  0.044  1.0
  F  F21  1  0.820  0.930  0.456  1.0
  F  F22  1  0.930  0.820  0.956  1.0
  F  F23  1  0.180  0.070  0.544  1.0
  F  F24  1  0.675  0.741  0.894  1.0
  F  F25  1  0.259  0.325  0.606  1.0
  F  F26  1  0.325  0.259  0.106  1.0
  F  F27  1  0.741  0.675  0.394  1.0
  F  F28  1  0.251  0.503  0.794  1.0
  F  F29  1  0.497  0.749  0.706  1.0
[/CIF]
.