The crystal structure described by YO2F crystallizes in the monoclinic Pm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), one F(1), and one F(2) atom. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), two equivalent F(1), and two equivalent F(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Y(2) and two equivalent Y(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second F site, F(2) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. is represented by the CIF file [CIF]
data_YO2F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.730
_cell_length_b   5.822
_cell_length_c   5.972
_cell_angle_alpha   64.458
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   117.014
_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
  Y  Y0  1  0.000  0.635  0.680  1.0
  Y  Y1  1  0.500  0.361  0.312  1.0
  O  O2  1  0.000  0.080  0.591  1.0
  O  O3  1  0.500  0.401  0.671  1.0
  O  O4  1  0.500  0.673  0.886  1.0
  O  O5  1  0.500  0.921  0.465  1.0
  F  F6  1  0.000  0.618  0.302  1.0
  F  F7  1  0.000  0.310  0.093  1.0
[/CIF]
.
The crystal structure described by YO2F crystallizes in the monoclinic Pm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), one F(1), and one F(2) atom. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), two equivalent F(1), and two equivalent F(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Y(2) and two equivalent Y(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second F site, F(2) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. is represented by the CIF file [CIF]
data_YO2F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.730
_cell_length_b   5.822
_cell_length_c   5.972
_cell_angle_alpha   64.458
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   117.014
_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
  Y  Y0  1  0.000  0.635  0.680  1.0
  Y  Y1  1  0.500  0.361  0.312  1.0
  O  O2  1  0.000  0.080  0.591  1.0
  O  O3  1  0.500  0.401  0.671  1.0
  O  O4  1  0.500  0.673  0.886  1.0
  O  O5  1  0.500  0.921  0.465  1.0
  F  F6  1  0.000  0.618  0.302  1.0
  F  F7  1  0.000  0.310  0.093  1.0
[/CIF]
.