The crystal structure described by Mg2W3CrS8 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(4), and two equivalent S(5) atoms to form distorted MgS4 trigonal pyramids that share corners with three equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles are 69°. In the second Mg site, Mg(2) is bonded to one S(3), one S(6), and two equivalent S(2) atoms to form MgS4 trigonal pyramids that share corners with three equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one S(3), one S(4), two equivalent S(2), and two equivalent S(5) 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. Cr(1) is bonded to one S(1), one S(6), two equivalent S(2), and two equivalent S(5) atoms to form CrS6 octahedra that share corners with three equivalent Mg(1)S4 trigonal pyramids and corners with three equivalent Mg(2)S4 trigonal pyramids. There are six inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1), two equivalent W(2), and one Cr(1) atom to form distorted SMgCrW2 trigonal pyramids that share  a cornercorner with one S(4)MgW3 tetrahedra, corners with two equivalent S(5)MgCrW2 trigonal pyramids,  an edgeedge with one S(4)MgW3 tetrahedra, and edges with two equivalent S(5)MgCrW2 trigonal pyramids. In the second S site, S(2) is bonded in a 4-coordinate geometry to one Mg(2), one W(1), one W(2), and one Cr(1) atom. In the third S site, S(3) is bonded in a 4-coordinate geometry to one Mg(2), one W(1), and two equivalent W(2) atoms. In the fourth S site, S(4) is bonded to one Mg(1), one W(1), and two equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing SMgW3 tetrahedra. In the fifth S site, S(5) is bonded to one Mg(1), one W(1), one W(2), and one Cr(1) atom to form distorted SMgCrW2 trigonal pyramids that share  a cornercorner with one S(4)MgW3 tetrahedra,  a cornercorner with one S(1)MgCrW2 trigonal pyramid,  a cornercorner with one S(5)MgCrW2 trigonal pyramid,  an edgeedge with one S(4)MgW3 tetrahedra,  an edgeedge with one S(1)MgCrW2 trigonal pyramid, and  an edgeedge with one S(5)MgCrW2 trigonal pyramid. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Mg(2), two equivalent W(2), and one Cr(1) atom. is represented by the CIF card [CIF]
data_Mg2CrW3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.970
_cell_length_b   7.464
_cell_length_c   6.970
_cell_angle_alpha   62.158
_cell_angle_beta   60.043
_cell_angle_gamma   62.172
_symmetry_Int_Tables_number   1
_cell_volume   264.555
_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  0.860  0.922  0.860  1.0
  Mg  Mg1  1  0.111  0.168  0.111  1.0
  Cr  Cr2  1  0.517  0.947  0.518  1.0
  W  W3  1  0.467  0.506  0.467  1.0
  W  W4  1  0.468  0.506  0.059  1.0
  W  W5  1  0.059  0.506  0.468  1.0
  S  S6  1  0.754  0.715  0.754  1.0
  S  S7  1  0.279  0.234  0.708  1.0
  S  S8  1  0.240  0.777  0.241  1.0
  S  S9  1  0.708  0.234  0.279  1.0
  S  S10  1  0.727  0.318  0.727  1.0
  S  S11  1  0.276  0.715  0.754  1.0
  S  S12  1  0.279  0.236  0.279  1.0
  S  S13  1  0.754  0.715  0.276  1.0
[/CIF]
.
The crystal structure described by Mg2W3CrS8 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(4), and two equivalent S(5) atoms to form distorted MgS4 trigonal pyramids that share corners with three equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles are 69°. In the second Mg site, Mg(2) is bonded to one S(3), one S(6), and two equivalent S(2) atoms to form MgS4 trigonal pyramids that share corners with three equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one S(3), one S(4), two equivalent S(2), and two equivalent S(5) 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. Cr(1) is bonded to one S(1), one S(6), two equivalent S(2), and two equivalent S(5) atoms to form CrS6 octahedra that share corners with three equivalent Mg(1)S4 trigonal pyramids and corners with three equivalent Mg(2)S4 trigonal pyramids. There are six inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1), two equivalent W(2), and one Cr(1) atom to form distorted SMgCrW2 trigonal pyramids that share  a cornercorner with one S(4)MgW3 tetrahedra, corners with two equivalent S(5)MgCrW2 trigonal pyramids,  an edgeedge with one S(4)MgW3 tetrahedra, and edges with two equivalent S(5)MgCrW2 trigonal pyramids. In the second S site, S(2) is bonded in a 4-coordinate geometry to one Mg(2), one W(1), one W(2), and one Cr(1) atom. In the third S site, S(3) is bonded in a 4-coordinate geometry to one Mg(2), one W(1), and two equivalent W(2) atoms. In the fourth S site, S(4) is bonded to one Mg(1), one W(1), and two equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing SMgW3 tetrahedra. In the fifth S site, S(5) is bonded to one Mg(1), one W(1), one W(2), and one Cr(1) atom to form distorted SMgCrW2 trigonal pyramids that share  a cornercorner with one S(4)MgW3 tetrahedra,  a cornercorner with one S(1)MgCrW2 trigonal pyramid,  a cornercorner with one S(5)MgCrW2 trigonal pyramid,  an edgeedge with one S(4)MgW3 tetrahedra,  an edgeedge with one S(1)MgCrW2 trigonal pyramid, and  an edgeedge with one S(5)MgCrW2 trigonal pyramid. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Mg(2), two equivalent W(2), and one Cr(1) atom. is represented by the CIF card [CIF]
data_Mg2CrW3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.970
_cell_length_b   7.464
_cell_length_c   6.970
_cell_angle_alpha   62.158
_cell_angle_beta   60.043
_cell_angle_gamma   62.172
_symmetry_Int_Tables_number   1
_cell_volume   264.555
_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  0.860  0.922  0.860  1.0
  Mg  Mg1  1  0.111  0.168  0.111  1.0
  Cr  Cr2  1  0.517  0.947  0.518  1.0
  W  W3  1  0.467  0.506  0.467  1.0
  W  W4  1  0.468  0.506  0.059  1.0
  W  W5  1  0.059  0.506  0.468  1.0
  S  S6  1  0.754  0.715  0.754  1.0
  S  S7  1  0.279  0.234  0.708  1.0
  S  S8  1  0.240  0.777  0.241  1.0
  S  S9  1  0.708  0.234  0.279  1.0
  S  S10  1  0.727  0.318  0.727  1.0
  S  S11  1  0.276  0.715  0.754  1.0
  S  S12  1  0.279  0.236  0.279  1.0
  S  S13  1  0.754  0.715  0.276  1.0
[/CIF]
.