The structure described by Mg2W3CoS8 crystallizes in the monoclinic Cm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one S(1), one S(6), and two equivalent S(4) atoms to form MgS4 trigonal pyramids that share corners with three equivalent Co(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. In the second Mg site, Mg(2) is bonded to one S(2), one S(5), and two equivalent S(3) atoms to form MgS4 tetrahedra that share corners with three equivalent Co(1)S6 octahedra. The corner-sharing octahedral tilt angles are 67°. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one S(1), one S(5), two equivalent S(3), and two equivalent S(4) atoms. In the second W site, W(2) is bonded in a 6-coordinate geometry to one S(1), one S(2), one S(3), one S(4), one S(5), and one S(6) atom. Co(1) is bonded to one S(2), one S(6), two equivalent S(3), and two equivalent S(4) atoms to form CoS6 octahedra that share corners with three equivalent Mg(2)S4 tetrahedra and corners with three equivalent Mg(1)S4 trigonal pyramids. There are six inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), and two equivalent W(2) atoms. In the second S site, S(2) is bonded to one Mg(2), two equivalent W(2), and one Co(1) atom to form distorted SMgCoW2 tetrahedra that share  a cornercorner with one S(5)MgW3 tetrahedra, corners with two equivalent S(3)MgCoW2 tetrahedra,  an edgeedge with one S(5)MgW3 tetrahedra, and edges with two equivalent S(3)MgCoW2 tetrahedra. In the third S site, S(3) is bonded to one Mg(2), one W(1), one W(2), and one Co(1) atom to form distorted SMgCoW2 tetrahedra that share  a cornercorner with one S(2)MgCoW2 tetrahedra,  a cornercorner with one S(3)MgCoW2 tetrahedra,  a cornercorner with one S(5)MgW3 tetrahedra,  an edgeedge with one S(2)MgCoW2 tetrahedra,  an edgeedge with one S(3)MgCoW2 tetrahedra, and  an edgeedge with one S(5)MgW3 tetrahedra. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), one W(2), and one Co(1) atom. In the fifth S site, S(5) is bonded to one Mg(2), one W(1), and two equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing SMgW3 tetrahedra. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent W(2), and one Co(1) atom. is represented by the CIF file [CIF]
data_Mg2CoW3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.383
_cell_length_b   7.380
_cell_length_c   7.378
_cell_angle_alpha   55.939
_cell_angle_beta   55.881
_cell_angle_gamma   55.792
_symmetry_Int_Tables_number   1
_cell_volume   257.047
_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  0.892  0.892  0.893  1.0
  Mg  Mg1  1  0.139  0.139  0.138  1.0
  Co  Co2  1  0.486  0.486  0.486  1.0
  W  W3  1  0.532  0.532  0.940  1.0
  W  W4  1  0.939  0.532  0.532  1.0
  W  W5  1  0.532  0.939  0.532  1.0
  S  S6  1  0.759  0.760  0.760  1.0
  S  S7  1  0.256  0.256  0.714  1.0
  S  S8  1  0.255  0.714  0.256  1.0
  S  S9  1  0.714  0.256  0.256  1.0
  S  S10  1  0.715  0.294  0.714  1.0
  S  S11  1  0.295  0.714  0.714  1.0
  S  S12  1  0.272  0.272  0.271  1.0
  S  S13  1  0.714  0.714  0.294  1.0
[/CIF]
.
The structure described by Mg2W3CoS8 crystallizes in the monoclinic Cm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one S(1), one S(6), and two equivalent S(4) atoms to form MgS4 trigonal pyramids that share corners with three equivalent Co(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. In the second Mg site, Mg(2) is bonded to one S(2), one S(5), and two equivalent S(3) atoms to form MgS4 tetrahedra that share corners with three equivalent Co(1)S6 octahedra. The corner-sharing octahedral tilt angles are 67°. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one S(1), one S(5), two equivalent S(3), and two equivalent S(4) atoms. In the second W site, W(2) is bonded in a 6-coordinate geometry to one S(1), one S(2), one S(3), one S(4), one S(5), and one S(6) atom. Co(1) is bonded to one S(2), one S(6), two equivalent S(3), and two equivalent S(4) atoms to form CoS6 octahedra that share corners with three equivalent Mg(2)S4 tetrahedra and corners with three equivalent Mg(1)S4 trigonal pyramids. There are six inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), and two equivalent W(2) atoms. In the second S site, S(2) is bonded to one Mg(2), two equivalent W(2), and one Co(1) atom to form distorted SMgCoW2 tetrahedra that share  a cornercorner with one S(5)MgW3 tetrahedra, corners with two equivalent S(3)MgCoW2 tetrahedra,  an edgeedge with one S(5)MgW3 tetrahedra, and edges with two equivalent S(3)MgCoW2 tetrahedra. In the third S site, S(3) is bonded to one Mg(2), one W(1), one W(2), and one Co(1) atom to form distorted SMgCoW2 tetrahedra that share  a cornercorner with one S(2)MgCoW2 tetrahedra,  a cornercorner with one S(3)MgCoW2 tetrahedra,  a cornercorner with one S(5)MgW3 tetrahedra,  an edgeedge with one S(2)MgCoW2 tetrahedra,  an edgeedge with one S(3)MgCoW2 tetrahedra, and  an edgeedge with one S(5)MgW3 tetrahedra. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), one W(2), and one Co(1) atom. In the fifth S site, S(5) is bonded to one Mg(2), one W(1), and two equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing SMgW3 tetrahedra. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent W(2), and one Co(1) atom. is represented by the CIF file [CIF]
data_Mg2CoW3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.383
_cell_length_b   7.380
_cell_length_c   7.378
_cell_angle_alpha   55.939
_cell_angle_beta   55.881
_cell_angle_gamma   55.792
_symmetry_Int_Tables_number   1
_cell_volume   257.047
_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  0.892  0.892  0.893  1.0
  Mg  Mg1  1  0.139  0.139  0.138  1.0
  Co  Co2  1  0.486  0.486  0.486  1.0
  W  W3  1  0.532  0.532  0.940  1.0
  W  W4  1  0.939  0.532  0.532  1.0
  W  W5  1  0.532  0.939  0.532  1.0
  S  S6  1  0.759  0.760  0.760  1.0
  S  S7  1  0.256  0.256  0.714  1.0
  S  S8  1  0.255  0.714  0.256  1.0
  S  S9  1  0.714  0.256  0.256  1.0
  S  S10  1  0.715  0.294  0.714  1.0
  S  S11  1  0.295  0.714  0.714  1.0
  S  S12  1  0.272  0.272  0.271  1.0
  S  S13  1  0.714  0.714  0.294  1.0
[/CIF]
.