The structure described by MgCrGaS4 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 Ga(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 57-60°. 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 Ga(1)S6 octahedra. Ga(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form GaS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Ga(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 Ga(1) atom to form distorted SMgCr2Ga trigonal pyramids that share corners with six equivalent S(1)MgCr2Ga trigonal pyramids, corners with six equivalent S(2)MgCrGa2 trigonal pyramids,  an edgeedge with one S(1)MgCr2Ga trigonal pyramid, and edges with two equivalent S(2)MgCrGa2 trigonal pyramids. In the second S site, S(2) is bonded to one Mg(1), one Cr(1), and two equivalent Ga(1) atoms to form distorted SMgCrGa2 trigonal pyramids that share corners with six equivalent S(1)MgCr2Ga trigonal pyramids, corners with six equivalent S(2)MgCrGa2 trigonal pyramids,  an edgeedge with one S(2)MgCrGa2 trigonal pyramid, and edges with two equivalent S(1)MgCr2Ga trigonal pyramids. is represented by the CIF card [CIF]
data_MgCrGaS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.268
_cell_length_b   7.283
_cell_length_c   7.282
_cell_angle_alpha   59.888
_cell_angle_beta   60.064
_cell_angle_gamma   60.065
_symmetry_Int_Tables_number   1
_cell_volume   272.605
_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
  Cr  Cr2  1  0.500  0.500  1.000  1.0
  Cr  Cr3  1  0.500  1.000  0.500  1.0
  Ga  Ga4  1  0.500  0.500  0.500  1.0
  Ga  Ga5  1  1.000  0.500  0.500  1.0
  S  S6  1  0.731  0.740  0.740  1.0
  S  S7  1  0.266  0.255  0.714  1.0
  S  S8  1  0.266  0.714  0.255  1.0
  S  S9  1  0.712  0.260  0.260  1.0
  S  S10  1  0.734  0.286  0.745  1.0
  S  S11  1  0.288  0.740  0.740  1.0
  S  S12  1  0.269  0.260  0.260  1.0
  S  S13  1  0.734  0.745  0.286  1.0
[/CIF]
.
The structure described by MgCrGaS4 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 Ga(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 57-60°. 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 Ga(1)S6 octahedra. Ga(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form GaS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Ga(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 Ga(1) atom to form distorted SMgCr2Ga trigonal pyramids that share corners with six equivalent S(1)MgCr2Ga trigonal pyramids, corners with six equivalent S(2)MgCrGa2 trigonal pyramids,  an edgeedge with one S(1)MgCr2Ga trigonal pyramid, and edges with two equivalent S(2)MgCrGa2 trigonal pyramids. In the second S site, S(2) is bonded to one Mg(1), one Cr(1), and two equivalent Ga(1) atoms to form distorted SMgCrGa2 trigonal pyramids that share corners with six equivalent S(1)MgCr2Ga trigonal pyramids, corners with six equivalent S(2)MgCrGa2 trigonal pyramids,  an edgeedge with one S(2)MgCrGa2 trigonal pyramid, and edges with two equivalent S(1)MgCr2Ga trigonal pyramids. is represented by the CIF card [CIF]
data_MgCrGaS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.268
_cell_length_b   7.283
_cell_length_c   7.282
_cell_angle_alpha   59.888
_cell_angle_beta   60.064
_cell_angle_gamma   60.065
_symmetry_Int_Tables_number   1
_cell_volume   272.605
_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
  Cr  Cr2  1  0.500  0.500  1.000  1.0
  Cr  Cr3  1  0.500  1.000  0.500  1.0
  Ga  Ga4  1  0.500  0.500  0.500  1.0
  Ga  Ga5  1  1.000  0.500  0.500  1.0
  S  S6  1  0.731  0.740  0.740  1.0
  S  S7  1  0.266  0.255  0.714  1.0
  S  S8  1  0.266  0.714  0.255  1.0
  S  S9  1  0.712  0.260  0.260  1.0
  S  S10  1  0.734  0.286  0.745  1.0
  S  S11  1  0.288  0.740  0.740  1.0
  S  S12  1  0.269  0.260  0.260  1.0
  S  S13  1  0.734  0.745  0.286  1.0
[/CIF]
.