The material structure described by MgF2 crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent F(2) and three equivalent F(1) atoms to form a mixture of distorted corner and edge-sharing MgF5 trigonal bipyramids. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to three equivalent Mg(1) atoms. In the second F site, F(2) is bonded in a linear geometry to two equivalent Mg(1) atoms. is represented by the CIF file [CIF]
data_MgF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.754
_cell_length_b   5.754
_cell_length_c   5.754
_cell_angle_alpha   140.206
_cell_angle_beta   110.035
_cell_angle_gamma   83.630
_symmetry_Int_Tables_number   1
_cell_volume   110.793
_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
  Mg  Mg0  1  0.855  0.605  0.250  1.0
  Mg  Mg1  1  0.145  0.395  0.750  1.0
  F  F2  1  0.091  0.841  0.250  1.0
  F  F3  1  0.500  0.500  0.000  1.0
  F  F4  1  0.909  0.159  0.750  1.0
  F  F5  1  0.000  0.500  0.500  1.0
[/CIF]
.
The material structure described by MgF2 crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent F(2) and three equivalent F(1) atoms to form a mixture of distorted corner and edge-sharing MgF5 trigonal bipyramids. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to three equivalent Mg(1) atoms. In the second F site, F(2) is bonded in a linear geometry to two equivalent Mg(1) atoms. is represented by the CIF file [CIF]
data_MgF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.754
_cell_length_b   5.754
_cell_length_c   5.754
_cell_angle_alpha   140.206
_cell_angle_beta   110.035
_cell_angle_gamma   83.630
_symmetry_Int_Tables_number   1
_cell_volume   110.793
_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
  Mg  Mg0  1  0.855  0.605  0.250  1.0
  Mg  Mg1  1  0.145  0.395  0.750  1.0
  F  F2  1  0.091  0.841  0.250  1.0
  F  F3  1  0.500  0.500  0.000  1.0
  F  F4  1  0.909  0.159  0.750  1.0
  F  F5  1  0.000  0.500  0.500  1.0
[/CIF]
.