The crystal structure described by LiYF2 crystallizes in the tetragonal I4_1/amd space group. The structure consists of a LiYF2 framework. Li(1) is bonded in a linear geometry to two equivalent F(1) atoms. Y(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent F(1) atoms. F(1) is bonded in a distorted trigonal non-coplanar geometry to one Li(1) and two equivalent Y(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiYF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.364
_cell_length_b   7.364
_cell_length_c   7.364
_cell_angle_alpha   125.623
_cell_angle_beta   125.623
_cell_angle_gamma   80.509
_symmetry_Int_Tables_number   1
_cell_volume   254.502
_cell_formula_units_Z   4
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
  Li  Li0  1  0.875  0.625  0.250  1.0
  Li  Li1  1  0.375  0.625  0.750  1.0
  Li  Li2  1  0.375  0.625  0.250  1.0
  Li  Li3  1  0.375  0.125  0.750  1.0
  Y  Y4  1  0.375  0.125  0.250  1.0
  Y  Y5  1  0.875  0.125  0.750  1.0
  Y  Y6  1  0.875  0.125  0.250  1.0
  Y  Y7  1  0.875  0.625  0.750  1.0
  F  F8  1  0.208  0.414  0.205  1.0
  F  F9  1  0.208  0.003  0.795  1.0
  F  F10  1  0.164  0.458  0.705  1.0
  F  F11  1  0.542  0.836  0.295  1.0
  F  F12  1  0.753  0.458  0.295  1.0
  F  F13  1  0.542  0.247  0.705  1.0
  F  F14  1  0.586  0.792  0.795  1.0
  F  F15  1  0.997  0.792  0.205  1.0
[/CIF]
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The crystal structure described by LiYF2 crystallizes in the tetragonal I4_1/amd space group. The structure consists of a LiYF2 framework. Li(1) is bonded in a linear geometry to two equivalent F(1) atoms. Y(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent F(1) atoms. F(1) is bonded in a distorted trigonal non-coplanar geometry to one Li(1) and two equivalent Y(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiYF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.364
_cell_length_b   7.364
_cell_length_c   7.364
_cell_angle_alpha   125.623
_cell_angle_beta   125.623
_cell_angle_gamma   80.509
_symmetry_Int_Tables_number   1
_cell_volume   254.502
_cell_formula_units_Z   4
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
  Li  Li0  1  0.875  0.625  0.250  1.0
  Li  Li1  1  0.375  0.625  0.750  1.0
  Li  Li2  1  0.375  0.625  0.250  1.0
  Li  Li3  1  0.375  0.125  0.750  1.0
  Y  Y4  1  0.375  0.125  0.250  1.0
  Y  Y5  1  0.875  0.125  0.750  1.0
  Y  Y6  1  0.875  0.125  0.250  1.0
  Y  Y7  1  0.875  0.625  0.750  1.0
  F  F8  1  0.208  0.414  0.205  1.0
  F  F9  1  0.208  0.003  0.795  1.0
  F  F10  1  0.164  0.458  0.705  1.0
  F  F11  1  0.542  0.836  0.295  1.0
  F  F12  1  0.753  0.458  0.295  1.0
  F  F13  1  0.542  0.247  0.705  1.0
  F  F14  1  0.586  0.792  0.795  1.0
  F  F15  1  0.997  0.792  0.205  1.0
[/CIF]
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