The compound described by MgCo3TeO8 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Co(3)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-15°. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. In the third Co site, Co(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-15°. Te(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form TeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), one Co(3), and one Te(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(2), one Co(3), and one Te(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), one Co(2), and one Co(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(2), and one Te(1) atom. is represented by the CIF file [CIF]
data_MgCo3TeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.875
_cell_length_b   6.112
_cell_length_c   6.127
_cell_angle_alpha   59.189
_cell_angle_beta   118.781
_cell_angle_gamma   122.337
_symmetry_Int_Tables_number   1
_cell_volume   152.970
_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  0.500  0.000  0.500  1.0
  Co  Co1  1  0.500  0.500  0.000  1.0
  Co  Co2  1  0.500  0.000  0.000  1.0
  Co  Co3  1  0.000  0.500  0.000  1.0
  Te  Te4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.724  0.732  0.723  1.0
  O  O6  1  0.742  0.288  0.716  1.0
  O  O7  1  0.275  0.754  0.806  1.0
  O  O8  1  0.295  0.243  0.768  1.0
  O  O9  1  0.705  0.757  0.232  1.0
  O  O10  1  0.725  0.246  0.194  1.0
  O  O11  1  0.258  0.712  0.284  1.0
  O  O12  1  0.276  0.268  0.277  1.0
[/CIF]
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The compound described by MgCo3TeO8 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Co(3)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-15°. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. In the third Co site, Co(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-15°. Te(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form TeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), one Co(3), and one Te(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(2), one Co(3), and one Te(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), one Co(2), and one Co(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(2), and one Te(1) atom. is represented by the CIF file [CIF]
data_MgCo3TeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.875
_cell_length_b   6.112
_cell_length_c   6.127
_cell_angle_alpha   59.189
_cell_angle_beta   118.781
_cell_angle_gamma   122.337
_symmetry_Int_Tables_number   1
_cell_volume   152.970
_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  0.500  0.000  0.500  1.0
  Co  Co1  1  0.500  0.500  0.000  1.0
  Co  Co2  1  0.500  0.000  0.000  1.0
  Co  Co3  1  0.000  0.500  0.000  1.0
  Te  Te4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.724  0.732  0.723  1.0
  O  O6  1  0.742  0.288  0.716  1.0
  O  O7  1  0.275  0.754  0.806  1.0
  O  O8  1  0.295  0.243  0.768  1.0
  O  O9  1  0.705  0.757  0.232  1.0
  O  O10  1  0.725  0.246  0.194  1.0
  O  O11  1  0.258  0.712  0.284  1.0
  O  O12  1  0.276  0.268  0.277  1.0
[/CIF]
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