The structure described by MgMn2(OF)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to two equivalent O(1) and two equivalent F(1) atoms to form MgO2F2 tetrahedra that share corners with four equivalent Mn(2)O4F2 octahedra, corners with two equivalent Mg(1)O2F2 tetrahedra, and  an edgeedge with one Mn(2)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 12-55°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent F(1) atoms. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent F(1) atoms to form MnO4F2 octahedra that share corners with four equivalent Mg(1)O2F2 tetrahedra, edges with two equivalent Mn(2)O4F2 octahedra, and  an edgeedge with one Mg(1)O2F2 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mn(1) and two equivalent Mn(2) atoms. F(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(2), and two equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_MgMn2(OF)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.664
_cell_length_b   5.664
_cell_length_c   3.149
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   78.970
_symmetry_Int_Tables_number   1
_cell_volume   99.145
_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  0.207  0.207  0.500  1.0
  Mn  Mn1  1  0.894  0.894  0.000  1.0
  Mn  Mn2  1  0.528  0.528  0.500  1.0
  O  O3  1  0.334  0.334  0.000  1.0
  O  O4  1  0.677  0.677  0.000  1.0
  F  F5  1  0.188  0.853  0.500  1.0
  F  F6  1  0.853  0.188  0.500  1.0
[/CIF]
.
The structure described by MgMn2(OF)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to two equivalent O(1) and two equivalent F(1) atoms to form MgO2F2 tetrahedra that share corners with four equivalent Mn(2)O4F2 octahedra, corners with two equivalent Mg(1)O2F2 tetrahedra, and  an edgeedge with one Mn(2)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 12-55°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent F(1) atoms. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent F(1) atoms to form MnO4F2 octahedra that share corners with four equivalent Mg(1)O2F2 tetrahedra, edges with two equivalent Mn(2)O4F2 octahedra, and  an edgeedge with one Mg(1)O2F2 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mn(1) and two equivalent Mn(2) atoms. F(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(2), and two equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_MgMn2(OF)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.664
_cell_length_b   5.664
_cell_length_c   3.149
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   78.970
_symmetry_Int_Tables_number   1
_cell_volume   99.145
_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  0.207  0.207  0.500  1.0
  Mn  Mn1  1  0.894  0.894  0.000  1.0
  Mn  Mn2  1  0.528  0.528  0.500  1.0
  O  O3  1  0.334  0.334  0.000  1.0
  O  O4  1  0.677  0.677  0.000  1.0
  F  F5  1  0.188  0.853  0.500  1.0
  F  F6  1  0.853  0.188  0.500  1.0
[/CIF]
.