The compound described by MgSmCrS4 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 Sm(1)S6 octahedra and corners with six equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 49-66°. Sm(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form SmS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Sm(1)S6 octahedra, and edges with four equivalent Cr(1)S6 octahedra. 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 Sm(1)S6 octahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Sm(1), and two equivalent Cr(1) atoms. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Sm(1), and one Cr(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmMgCrS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.753
_cell_length_b   7.638
_cell_length_c   7.638
_cell_angle_alpha   59.310
_cell_angle_beta   59.499
_cell_angle_gamma   59.501
_symmetry_Int_Tables_number   1
_cell_volume   315.678
_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
  Sm  Sm0  1  0.500  0.500  0.500  1.0
  Sm  Sm1  1  1.000  0.500  0.500  1.0
  Mg  Mg2  1  0.874  0.876  0.876  1.0
  Mg  Mg3  1  0.126  0.124  0.124  1.0
  Cr  Cr4  1  0.500  0.500  1.000  1.0
  Cr  Cr5  1  0.500  1.000  0.500  1.0
  S  S6  1  0.706  0.757  0.757  1.0
  S  S7  1  0.272  0.224  0.732  1.0
  S  S8  1  0.272  0.732  0.224  1.0
  S  S9  1  0.721  0.243  0.243  1.0
  S  S10  1  0.728  0.268  0.776  1.0
  S  S11  1  0.279  0.757  0.757  1.0
  S  S12  1  0.294  0.243  0.243  1.0
  S  S13  1  0.728  0.776  0.268  1.0
[/CIF]
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The compound described by MgSmCrS4 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 Sm(1)S6 octahedra and corners with six equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 49-66°. Sm(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form SmS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Sm(1)S6 octahedra, and edges with four equivalent Cr(1)S6 octahedra. 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 Sm(1)S6 octahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Sm(1), and two equivalent Cr(1) atoms. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Sm(1), and one Cr(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmMgCrS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.753
_cell_length_b   7.638
_cell_length_c   7.638
_cell_angle_alpha   59.310
_cell_angle_beta   59.499
_cell_angle_gamma   59.501
_symmetry_Int_Tables_number   1
_cell_volume   315.678
_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
  Sm  Sm0  1  0.500  0.500  0.500  1.0
  Sm  Sm1  1  1.000  0.500  0.500  1.0
  Mg  Mg2  1  0.874  0.876  0.876  1.0
  Mg  Mg3  1  0.126  0.124  0.124  1.0
  Cr  Cr4  1  0.500  0.500  1.000  1.0
  Cr  Cr5  1  0.500  1.000  0.500  1.0
  S  S6  1  0.706  0.757  0.757  1.0
  S  S7  1  0.272  0.224  0.732  1.0
  S  S8  1  0.272  0.732  0.224  1.0
  S  S9  1  0.721  0.243  0.243  1.0
  S  S10  1  0.728  0.268  0.776  1.0
  S  S11  1  0.279  0.757  0.757  1.0
  S  S12  1  0.294  0.243  0.243  1.0
  S  S13  1  0.728  0.776  0.268  1.0
[/CIF]
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