The crystal structure described by MgMn3BiO8 crystallizes in the trigonal R3m space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one Bi(1) and three equivalent O(3) atoms. Mn(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form edge-sharing MnO6 octahedra. Bi(1) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1) and two equivalent Mn(1) atoms. In the fourth O site, O(4) 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   5.943
_cell_length_b   5.943
_cell_length_c   8.579
_cell_angle_alpha   69.734
_cell_angle_beta   110.266
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   240.510
_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  0.421  0.579  0.262  1.0
  Mn  Mn1  1  0.491  0.509  0.979  1.0
  Mn  Mn2  1  0.491  0.003  0.979  1.0
  Mn  Mn3  1  0.997  0.509  0.979  1.0
  Bi  Bi4  1  0.551  0.449  0.652  1.0
  O  O5  1  0.762  0.701  0.823  1.0
  O  O6  1  0.762  0.238  0.823  1.0
  O  O7  1  0.285  0.715  0.854  1.0
  O  O8  1  0.299  0.238  0.823  1.0
  O  O9  1  0.678  0.780  0.118  1.0
  O  O10  1  0.699  0.301  0.097  1.0
  O  O11  1  0.220  0.780  0.118  1.0
  O  O12  1  0.220  0.322  0.118  1.0
[/CIF]
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The crystal structure described by MgMn3BiO8 crystallizes in the trigonal R3m space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one Bi(1) and three equivalent O(3) atoms. Mn(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form edge-sharing MnO6 octahedra. Bi(1) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1) and two equivalent Mn(1) atoms. In the fourth O site, O(4) 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   5.943
_cell_length_b   5.943
_cell_length_c   8.579
_cell_angle_alpha   69.734
_cell_angle_beta   110.266
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   240.510
_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  0.421  0.579  0.262  1.0
  Mn  Mn1  1  0.491  0.509  0.979  1.0
  Mn  Mn2  1  0.491  0.003  0.979  1.0
  Mn  Mn3  1  0.997  0.509  0.979  1.0
  Bi  Bi4  1  0.551  0.449  0.652  1.0
  O  O5  1  0.762  0.701  0.823  1.0
  O  O6  1  0.762  0.238  0.823  1.0
  O  O7  1  0.285  0.715  0.854  1.0
  O  O8  1  0.299  0.238  0.823  1.0
  O  O9  1  0.678  0.780  0.118  1.0
  O  O10  1  0.699  0.301  0.097  1.0
  O  O11  1  0.220  0.780  0.118  1.0
  O  O12  1  0.220  0.322  0.118  1.0
[/CIF]
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