The compound described by MgCo2(BiO3)4 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(3) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(4) and four equivalent O(2) atoms to form distorted CoO5 square pyramids that share corners with six equivalent Bi(2)O6 octahedra and edges with two equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. In the second Co site, Co(2) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(6) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(3), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form distorted BiO6 octahedra that share corners with four equivalent Bi(2)O6 octahedra,  an edgeedge with one Bi(1)O6 octahedra, and  an edgeedge with one Co(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 48-57°. In the second Bi site, Bi(2) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms to form BiO6 octahedra that share corners with four equivalent Bi(1)O6 octahedra, corners with three equivalent Co(1)O5 square pyramids, and  an edgeedge with one Bi(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Co(2), and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Co(1), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1) and two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded in a water-like geometry to two equivalent Bi(2) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Co(2), one Bi(1), and one Bi(2) atom. is represented by the CIF file [CIF]
data_MgCo2(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.103
_cell_length_b   5.103
_cell_length_c   10.366
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   84.062
_symmetry_Int_Tables_number   1
_cell_volume   268.482
_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  0.267  0.267  0.500  1.0
  Co  Co1  1  0.024  0.024  0.000  1.0
  Co  Co2  1  0.616  0.616  0.500  1.0
  Bi  Bi3  1  0.976  0.976  0.310  1.0
  Bi  Bi4  1  0.976  0.976  0.690  1.0
  Bi  Bi5  1  0.475  0.475  0.159  1.0
  Bi  Bi6  1  0.475  0.475  0.841  1.0
  O  O7  1  0.300  0.829  0.500  1.0
  O  O8  1  0.166  0.790  0.145  1.0
  O  O9  1  0.166  0.790  0.855  1.0
  O  O10  1  0.284  0.284  0.311  1.0
  O  O11  1  0.284  0.284  0.689  1.0
  O  O12  1  0.283  0.283  0.000  1.0
  O  O13  1  0.657  0.657  0.000  1.0
  O  O14  1  0.672  0.672  0.322  1.0
  O  O15  1  0.672  0.672  0.678  1.0
  O  O16  1  0.790  0.166  0.145  1.0
  O  O17  1  0.790  0.166  0.855  1.0
  O  O18  1  0.829  0.300  0.500  1.0
[/CIF]
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The compound described by MgCo2(BiO3)4 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(3) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(4) and four equivalent O(2) atoms to form distorted CoO5 square pyramids that share corners with six equivalent Bi(2)O6 octahedra and edges with two equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. In the second Co site, Co(2) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(6) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(3), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form distorted BiO6 octahedra that share corners with four equivalent Bi(2)O6 octahedra,  an edgeedge with one Bi(1)O6 octahedra, and  an edgeedge with one Co(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 48-57°. In the second Bi site, Bi(2) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms to form BiO6 octahedra that share corners with four equivalent Bi(1)O6 octahedra, corners with three equivalent Co(1)O5 square pyramids, and  an edgeedge with one Bi(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Co(2), and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Co(1), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1) and two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded in a water-like geometry to two equivalent Bi(2) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Co(2), one Bi(1), and one Bi(2) atom. is represented by the CIF file [CIF]
data_MgCo2(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.103
_cell_length_b   5.103
_cell_length_c   10.366
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   84.062
_symmetry_Int_Tables_number   1
_cell_volume   268.482
_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  0.267  0.267  0.500  1.0
  Co  Co1  1  0.024  0.024  0.000  1.0
  Co  Co2  1  0.616  0.616  0.500  1.0
  Bi  Bi3  1  0.976  0.976  0.310  1.0
  Bi  Bi4  1  0.976  0.976  0.690  1.0
  Bi  Bi5  1  0.475  0.475  0.159  1.0
  Bi  Bi6  1  0.475  0.475  0.841  1.0
  O  O7  1  0.300  0.829  0.500  1.0
  O  O8  1  0.166  0.790  0.145  1.0
  O  O9  1  0.166  0.790  0.855  1.0
  O  O10  1  0.284  0.284  0.311  1.0
  O  O11  1  0.284  0.284  0.689  1.0
  O  O12  1  0.283  0.283  0.000  1.0
  O  O13  1  0.657  0.657  0.000  1.0
  O  O14  1  0.672  0.672  0.322  1.0
  O  O15  1  0.672  0.672  0.678  1.0
  O  O16  1  0.790  0.166  0.145  1.0
  O  O17  1  0.790  0.166  0.855  1.0
  O  O18  1  0.829  0.300  0.500  1.0
[/CIF]
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