The material described by Mg3Co crystallizes in the orthorhombic Pmm2 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), four equivalent Mg(3), and four equivalent Co(1) atoms to form a mixture of distorted edge, corner, and face-sharing MgMg8Co4 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), four equivalent Mg(3), and four equivalent Co(1) atoms to form a mixture of distorted edge, corner, and face-sharing MgMg8Co4 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 2-coordinate geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Co(1) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms. is represented by the CIF card [CIF]
data_Mg3Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.045
_cell_length_b   4.602
_cell_length_c   5.031
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   70.516
_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  0.670  1.0
  Mg  Mg1  1  0.000  0.500  0.315  1.0
  Mg  Mg2  1  0.500  0.500  0.852  1.0
  Co  Co3  1  0.500  0.000  0.162  1.0
[/CIF]
.
The material described by Mg3Co crystallizes in the orthorhombic Pmm2 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), four equivalent Mg(3), and four equivalent Co(1) atoms to form a mixture of distorted edge, corner, and face-sharing MgMg8Co4 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), four equivalent Mg(3), and four equivalent Co(1) atoms to form a mixture of distorted edge, corner, and face-sharing MgMg8Co4 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 2-coordinate geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Co(1) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms. is represented by the CIF card [CIF]
data_Mg3Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.045
_cell_length_b   4.602
_cell_length_c   5.031
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   70.516
_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  0.670  1.0
  Mg  Mg1  1  0.000  0.500  0.315  1.0
  Mg  Mg2  1  0.500  0.500  0.852  1.0
  Co  Co3  1  0.500  0.000  0.162  1.0
[/CIF]
.