The material described by MgF2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to three equivalent F(2) and four equivalent F(1) atoms to form a mixture of distorted corner, edge, and face-sharing MgF7 pentagonal bipyramids. There are two inequivalent F sites. In the first F site, F(1) is bonded in a square co-planar geometry to four equivalent Mg(1) atoms. In the second F site, F(2) is bonded in a distorted T-shaped geometry to three equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_MgF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.831
_cell_length_b   3.771
_cell_length_c   3.245
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   112.043
_symmetry_Int_Tables_number   1
_cell_volume   32.108
_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
  Mg  Mg0  1  0.013  0.026  0.500  1.0
  F  F1  1  0.562  0.124  0.000  1.0
  F  F2  1  0.300  0.600  0.500  1.0
[/CIF]
.
The material described by MgF2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to three equivalent F(2) and four equivalent F(1) atoms to form a mixture of distorted corner, edge, and face-sharing MgF7 pentagonal bipyramids. There are two inequivalent F sites. In the first F site, F(1) is bonded in a square co-planar geometry to four equivalent Mg(1) atoms. In the second F site, F(2) is bonded in a distorted T-shaped geometry to three equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_MgF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.831
_cell_length_b   3.771
_cell_length_c   3.245
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   112.043
_symmetry_Int_Tables_number   1
_cell_volume   32.108
_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
  Mg  Mg0  1  0.013  0.026  0.500  1.0
  F  F1  1  0.562  0.124  0.000  1.0
  F  F2  1  0.300  0.600  0.500  1.0
[/CIF]
.