The material structure described by MgCrAlS4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form MgS4 tetrahedra that share corners with six equivalent Cr(1)S6 octahedra and corners with six equivalent Al(1)S6 octahedra. The corner-sharing octahedral tilt angles are 59°. Cr(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form CrS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Cr(1)S6 octahedra, and edges with four equivalent Al(1)S6 octahedra. Al(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form AlS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Al(1)S6 octahedra, and edges with four equivalent Cr(1)S6 octahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1), two equivalent Cr(1), and one Al(1) atom to form distorted SMgAlCr2 trigonal pyramids that share corners with six equivalent S(2)MgAl2Cr trigonal pyramids, corners with six equivalent S(1)MgAlCr2 trigonal pyramids,  an edgeedge with one S(1)MgAlCr2 trigonal pyramid, and edges with two equivalent S(2)MgAl2Cr trigonal pyramids. In the second S site, S(2) is bonded to one Mg(1), one Cr(1), and two equivalent Al(1) atoms to form distorted SMgAl2Cr trigonal pyramids that share corners with six equivalent S(2)MgAl2Cr trigonal pyramids, corners with six equivalent S(1)MgAlCr2 trigonal pyramids,  an edgeedge with one S(2)MgAl2Cr trigonal pyramid, and edges with two equivalent S(1)MgAlCr2 trigonal pyramids. is represented by the CIF file [CIF]
data_MgAlCrS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.209
_cell_length_b   7.235
_cell_length_c   7.235
_cell_angle_alpha   60.228
_cell_angle_beta   60.117
_cell_angle_gamma   60.118
_symmetry_Int_Tables_number   1
_cell_volume   267.731
_cell_formula_units_Z   2
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  0.874  0.876  0.876  1.0
  Mg  Mg1  1  0.126  0.124  0.124  1.0
  Al  Al2  1  0.500  0.500  0.500  1.0
  Al  Al3  1  1.000  0.500  0.500  1.0
  Cr  Cr4  1  0.500  0.500  0.000  1.0
  Cr  Cr5  1  0.500  0.000  0.500  1.0
  S  S6  1  0.737  0.737  0.737  1.0
  S  S7  1  0.263  0.262  0.713  1.0
  S  S8  1  0.263  0.713  0.262  1.0
  S  S9  1  0.711  0.263  0.263  1.0
  S  S10  1  0.737  0.287  0.738  1.0
  S  S11  1  0.289  0.737  0.737  1.0
  S  S12  1  0.263  0.263  0.263  1.0
  S  S13  1  0.737  0.738  0.287  1.0
[/CIF]
.
The material structure described by MgCrAlS4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form MgS4 tetrahedra that share corners with six equivalent Cr(1)S6 octahedra and corners with six equivalent Al(1)S6 octahedra. The corner-sharing octahedral tilt angles are 59°. Cr(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form CrS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Cr(1)S6 octahedra, and edges with four equivalent Al(1)S6 octahedra. Al(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form AlS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Al(1)S6 octahedra, and edges with four equivalent Cr(1)S6 octahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1), two equivalent Cr(1), and one Al(1) atom to form distorted SMgAlCr2 trigonal pyramids that share corners with six equivalent S(2)MgAl2Cr trigonal pyramids, corners with six equivalent S(1)MgAlCr2 trigonal pyramids,  an edgeedge with one S(1)MgAlCr2 trigonal pyramid, and edges with two equivalent S(2)MgAl2Cr trigonal pyramids. In the second S site, S(2) is bonded to one Mg(1), one Cr(1), and two equivalent Al(1) atoms to form distorted SMgAl2Cr trigonal pyramids that share corners with six equivalent S(2)MgAl2Cr trigonal pyramids, corners with six equivalent S(1)MgAlCr2 trigonal pyramids,  an edgeedge with one S(2)MgAl2Cr trigonal pyramid, and edges with two equivalent S(1)MgAlCr2 trigonal pyramids. is represented by the CIF file [CIF]
data_MgAlCrS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.209
_cell_length_b   7.235
_cell_length_c   7.235
_cell_angle_alpha   60.228
_cell_angle_beta   60.117
_cell_angle_gamma   60.118
_symmetry_Int_Tables_number   1
_cell_volume   267.731
_cell_formula_units_Z   2
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  0.874  0.876  0.876  1.0
  Mg  Mg1  1  0.126  0.124  0.124  1.0
  Al  Al2  1  0.500  0.500  0.500  1.0
  Al  Al3  1  1.000  0.500  0.500  1.0
  Cr  Cr4  1  0.500  0.500  0.000  1.0
  Cr  Cr5  1  0.500  0.000  0.500  1.0
  S  S6  1  0.737  0.737  0.737  1.0
  S  S7  1  0.263  0.262  0.713  1.0
  S  S8  1  0.263  0.713  0.262  1.0
  S  S9  1  0.711  0.263  0.263  1.0
  S  S10  1  0.737  0.287  0.738  1.0
  S  S11  1  0.289  0.737  0.737  1.0
  S  S12  1  0.263  0.263  0.263  1.0
  S  S13  1  0.737  0.738  0.287  1.0
[/CIF]
.