The compound described by MgCd2(CoO2)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(6), one O(7), and one O(8) atom to form distorted MgO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra, corners with two equivalent Cd(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 26-61°. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(7) atom. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form CoO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Cd(2)O4 tetrahedra, and corners with three equivalent Cd(1)O4 trigonal pyramids. In the third Co site, Co(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the fourth Co site, Co(4) is bonded in a 5-coordinate geometry to one O(3), one O(4), one O(5), one O(7), and one O(8) atom. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form distorted CdO4 trigonal pyramids that share corners with three equivalent Co(2)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-78°. In the second Cd site, Cd(2) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form distorted CdO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-74°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Co(2), and one Cd(1) atom. In the second O site, O(2) is bonded to one Co(1), one Co(2), one Co(3), and one Cd(2) atom to form distorted OCdCo3 tetrahedra that share corners with two equivalent O(3)CdCo3 tetrahedra, corners with two equivalent O(4)CdCo3 tetrahedra,  a cornercorner with one O(7)MgCdCo3 trigonal bipyramid, and  an edgeedge with one O(7)MgCdCo3 trigonal bipyramid. In the third O site, O(3) is bonded to one Co(1), one Co(3), one Co(4), and one Cd(1) atom to form OCdCo3 tetrahedra that share  a cornercorner with one O(4)CdCo3 tetrahedra, corners with two equivalent O(2)CdCo3 tetrahedra, corners with three equivalent O(7)MgCdCo3 trigonal bipyramids, and  an edgeedge with one O(4)CdCo3 tetrahedra. In the fourth O site, O(4) is bonded to one Co(2), one Co(3), one Co(4), and one Cd(1) atom to form OCdCo3 tetrahedra that share  a cornercorner with one O(3)CdCo3 tetrahedra, corners with two equivalent O(2)CdCo3 tetrahedra, corners with two equivalent O(7)MgCdCo3 trigonal bipyramids, and  an edgeedge with one O(3)CdCo3 tetrahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Co(2), one Co(4), and one Cd(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Co(2), and one Cd(1) atom. In the seventh O site, O(7) is bonded to one Mg(1), one Co(1), one Co(3), one Co(4), and one Cd(2) atom to form a mixture of distorted corner and edge-sharing OMgCdCo3 trigonal bipyramids. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Mg(1), one Co(2), one Co(3), one Co(4), and one Cd(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCd2(CoO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.508
_cell_length_b   6.370
_cell_length_c   6.049
_cell_angle_alpha   63.410
_cell_angle_beta   85.867
_cell_angle_gamma   118.417
_symmetry_Int_Tables_number   1
_cell_volume   183.799
_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  0.263  0.461  0.740  1.0
  Cd  Cd1  1  0.913  0.851  0.097  1.0
  Cd  Cd2  1  0.813  0.606  0.732  1.0
  Co  Co3  1  0.350  0.280  0.338  1.0
  Co  Co4  1  0.897  0.264  0.368  1.0
  Co  Co5  1  0.424  0.894  0.263  1.0
  Co  Co6  1  0.440  0.889  0.815  1.0
  O  O7  1  0.127  0.235  0.129  1.0
  O  O8  1  0.619  0.291  0.171  1.0
  O  O9  1  0.540  0.717  0.131  1.0
  O  O10  1  0.155  0.714  0.133  1.0
  O  O11  1  0.647  0.270  0.631  1.0
  O  O12  1  0.122  0.208  0.612  1.0
  O  O13  1  0.208  0.781  0.611  1.0
  O  O14  1  0.616  0.811  0.595  1.0
[/CIF]
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The compound described by MgCd2(CoO2)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(6), one O(7), and one O(8) atom to form distorted MgO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra, corners with two equivalent Cd(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 26-61°. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(7) atom. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form CoO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Cd(2)O4 tetrahedra, and corners with three equivalent Cd(1)O4 trigonal pyramids. In the third Co site, Co(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the fourth Co site, Co(4) is bonded in a 5-coordinate geometry to one O(3), one O(4), one O(5), one O(7), and one O(8) atom. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form distorted CdO4 trigonal pyramids that share corners with three equivalent Co(2)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-78°. In the second Cd site, Cd(2) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form distorted CdO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-74°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Co(2), and one Cd(1) atom. In the second O site, O(2) is bonded to one Co(1), one Co(2), one Co(3), and one Cd(2) atom to form distorted OCdCo3 tetrahedra that share corners with two equivalent O(3)CdCo3 tetrahedra, corners with two equivalent O(4)CdCo3 tetrahedra,  a cornercorner with one O(7)MgCdCo3 trigonal bipyramid, and  an edgeedge with one O(7)MgCdCo3 trigonal bipyramid. In the third O site, O(3) is bonded to one Co(1), one Co(3), one Co(4), and one Cd(1) atom to form OCdCo3 tetrahedra that share  a cornercorner with one O(4)CdCo3 tetrahedra, corners with two equivalent O(2)CdCo3 tetrahedra, corners with three equivalent O(7)MgCdCo3 trigonal bipyramids, and  an edgeedge with one O(4)CdCo3 tetrahedra. In the fourth O site, O(4) is bonded to one Co(2), one Co(3), one Co(4), and one Cd(1) atom to form OCdCo3 tetrahedra that share  a cornercorner with one O(3)CdCo3 tetrahedra, corners with two equivalent O(2)CdCo3 tetrahedra, corners with two equivalent O(7)MgCdCo3 trigonal bipyramids, and  an edgeedge with one O(3)CdCo3 tetrahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Co(2), one Co(4), and one Cd(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Co(2), and one Cd(1) atom. In the seventh O site, O(7) is bonded to one Mg(1), one Co(1), one Co(3), one Co(4), and one Cd(2) atom to form a mixture of distorted corner and edge-sharing OMgCdCo3 trigonal bipyramids. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Mg(1), one Co(2), one Co(3), one Co(4), and one Cd(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCd2(CoO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.508
_cell_length_b   6.370
_cell_length_c   6.049
_cell_angle_alpha   63.410
_cell_angle_beta   85.867
_cell_angle_gamma   118.417
_symmetry_Int_Tables_number   1
_cell_volume   183.799
_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  0.263  0.461  0.740  1.0
  Cd  Cd1  1  0.913  0.851  0.097  1.0
  Cd  Cd2  1  0.813  0.606  0.732  1.0
  Co  Co3  1  0.350  0.280  0.338  1.0
  Co  Co4  1  0.897  0.264  0.368  1.0
  Co  Co5  1  0.424  0.894  0.263  1.0
  Co  Co6  1  0.440  0.889  0.815  1.0
  O  O7  1  0.127  0.235  0.129  1.0
  O  O8  1  0.619  0.291  0.171  1.0
  O  O9  1  0.540  0.717  0.131  1.0
  O  O10  1  0.155  0.714  0.133  1.0
  O  O11  1  0.647  0.270  0.631  1.0
  O  O12  1  0.122  0.208  0.612  1.0
  O  O13  1  0.208  0.781  0.611  1.0
  O  O14  1  0.616  0.811  0.595  1.0
[/CIF]
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