The structure described by MgMn3BiO8 crystallizes in the trigonal R-3m space group. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share edges with six equivalent Mn(1)O6 octahedra. Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra and edges with four equivalent Mn(1)O6 octahedra. Bi(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), two equivalent Mn(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_MgMn3BiO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.973
_cell_length_b   5.973
_cell_length_c   6.649
_cell_angle_alpha   63.311
_cell_angle_beta   116.689
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   175.666
_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  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.500  0.000  0.000  1.0
  Mn  Mn3  1  0.000  0.500  0.000  1.0
  Bi  Bi4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.763  0.712  0.813  1.0
  O  O6  1  0.763  0.237  0.813  1.0
  O  O7  1  0.277  0.723  0.832  1.0
  O  O8  1  0.288  0.237  0.813  1.0
  O  O9  1  0.712  0.763  0.187  1.0
  O  O10  1  0.723  0.277  0.168  1.0
  O  O11  1  0.237  0.763  0.187  1.0
  O  O12  1  0.237  0.288  0.187  1.0
[/CIF]
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The structure described by MgMn3BiO8 crystallizes in the trigonal R-3m space group. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share edges with six equivalent Mn(1)O6 octahedra. Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra and edges with four equivalent Mn(1)O6 octahedra. Bi(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), two equivalent Mn(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_MgMn3BiO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.973
_cell_length_b   5.973
_cell_length_c   6.649
_cell_angle_alpha   63.311
_cell_angle_beta   116.689
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   175.666
_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  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.500  0.000  0.000  1.0
  Mn  Mn3  1  0.000  0.500  0.000  1.0
  Bi  Bi4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.763  0.712  0.813  1.0
  O  O6  1  0.763  0.237  0.813  1.0
  O  O7  1  0.277  0.723  0.832  1.0
  O  O8  1  0.288  0.237  0.813  1.0
  O  O9  1  0.712  0.763  0.187  1.0
  O  O10  1  0.723  0.277  0.168  1.0
  O  O11  1  0.237  0.763  0.187  1.0
  O  O12  1  0.237  0.288  0.187  1.0
[/CIF]
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