The material structure described by BaSn2S3 crystallizes in the monoclinic Pm space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to one S(1), one S(4), two equivalent S(10), and two equivalent S(11) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent Sn(4), one S(2), one S(5), two equivalent S(11), and two equivalent S(12) atoms. In the third Ba site, Ba(3) is bonded in a 9-coordinate geometry to two equivalent Sn(5), one S(3), one S(4), one S(6), two equivalent S(10), and two equivalent S(12) atoms. In the fourth Ba site, Ba(4) is bonded in a 9-coordinate geometry to two equivalent Sn(8), one S(1), one S(3), one S(4), two equivalent S(7), and two equivalent S(9) atoms. There are eight inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 3-coordinate geometry to one S(5) and two equivalent S(8) atoms. In the second Sn site, Sn(2) is bonded in a distorted T-shaped geometry to one S(6) and two equivalent S(9) atoms. In the third Sn site, Sn(3) is bonded in a 3-coordinate geometry to one S(7) and two equivalent S(5) atoms. In the fourth Sn site, Sn(4) is bonded in a 3-coordinate geometry to two equivalent Ba(2), one S(8), and two equivalent S(6) atoms. In the fifth Sn site, Sn(5) is bonded in a 3-coordinate geometry to two equivalent Ba(3), one S(9), and two equivalent S(4) atoms. In the sixth Sn site, Sn(6) is bonded in a distorted T-shaped geometry to one S(11) and two equivalent S(1) atoms. In the seventh Sn site, Sn(7) is bonded in a distorted trigonal non-coplanar geometry to one S(12) and two equivalent S(2) atoms. In the eighth Sn site, Sn(8) is bonded in a 3-coordinate geometry to two equivalent Ba(4), one S(10), and two equivalent S(3) atoms. There are twelve inequivalent S sites. In the first S site, S(1) is bonded to one Ba(1), one Ba(4), and two equivalent Sn(6) atoms to form distorted SBa2Sn2 tetrahedra that share corners with two equivalent S(9)Ba2Sn3 square pyramids, corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(1)Ba2Sn2 tetrahedra, and edges with two equivalent S(11)Ba4Sn square pyramids. In the second S site, S(2) is bonded in a distorted T-shaped geometry to one Ba(2) and two equivalent Sn(7) atoms. In the third S site, S(3) is bonded in a 4-coordinate geometry to one Ba(3), one Ba(4), and two equivalent Sn(8) atoms. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(3), one Ba(4), and two equivalent Sn(5) atoms. In the fifth S site, S(5) is bonded in a 4-coordinate geometry to one Ba(2), one Sn(1), and two equivalent Sn(3) atoms. In the sixth S site, S(6) is bonded to one Ba(3), one Sn(2), and two equivalent Sn(4) atoms to form distorted SBaSn3 tetrahedra that share corners with two equivalent S(9)Ba2Sn3 square pyramids, corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(6)BaSn3 tetrahedra, and corners with two equivalent S(12)Ba4Sn trigonal bipyramids. In the seventh S site, S(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba(4) and one Sn(3) atom. In the eighth S site, S(8) is bonded in a trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(1) atoms. In the ninth S site, S(9) is bonded to two equivalent Ba(4), one Sn(5), and two equivalent Sn(2) atoms to form distorted SBa2Sn3 square pyramids that share corners with two equivalent S(1)Ba2Sn2 tetrahedra, corners with two equivalent S(6)BaSn3 tetrahedra, and edges with two equivalent S(9)Ba2Sn3 square pyramids. In the tenth S site, S(10) is bonded to two equivalent Ba(1), two equivalent Ba(3), and one Sn(8) atom to form SBa4Sn square pyramids that share corners with two equivalent S(11)Ba4Sn square pyramids, corners with two equivalent S(1)Ba2Sn2 tetrahedra, corners with two equivalent S(6)BaSn3 tetrahedra, corners with two equivalent S(12)Ba4Sn trigonal bipyramids,  an edgeedge with one S(11)Ba4Sn square pyramid, edges with two equivalent S(10)Ba4Sn square pyramids, and  an edgeedge with one S(12)Ba4Sn trigonal bipyramid. In the eleventh S site, S(11) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Sn(6) atom to form SBa4Sn square pyramids that share corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(12)Ba4Sn trigonal bipyramids,  an edgeedge with one S(10)Ba4Sn square pyramid, edges with two equivalent S(11)Ba4Sn square pyramids, edges with two equivalent S(1)Ba2Sn2 tetrahedra, and  an edgeedge with one S(12)Ba4Sn trigonal bipyramid. In the twelfth S site, S(12) is bonded to two equivalent Ba(2), two equivalent Ba(3), and one Sn(7) atom to form SBa4Sn trigonal bipyramids that share corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(11)Ba4Sn square pyramids, corners with two equivalent S(6)BaSn3 tetrahedra,  an edgeedge with one S(10)Ba4Sn square pyramid,  an edgeedge with one S(11)Ba4Sn square pyramid, and edges with two equivalent S(12)Ba4Sn trigonal bipyramids. is represented by the CIF file [CIF]
data_BaSn2S3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.274
_cell_length_b   13.156
_cell_length_c   11.985
_cell_angle_alpha   90.609
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   673.765
_cell_formula_units_Z   4
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
  Ba  Ba0  1  0.250  0.146  0.608  1.0
  Ba  Ba1  1  0.250  0.477  0.614  1.0
  Ba  Ba2  1  0.250  0.809  0.610  1.0
  Ba  Ba3  1  0.250  0.024  0.095  1.0
  Sn  Sn4  1  0.250  0.366  0.125  1.0
  Sn  Sn5  1  0.250  0.700  0.122  1.0
  Sn  Sn6  1  0.750  0.211  0.357  1.0
  Sn  Sn7  1  0.750  0.540  0.359  1.0
  Sn  Sn8  1  0.750  0.872  0.367  1.0
  Sn  Sn9  1  0.750  0.295  0.872  1.0
  Sn  Sn10  1  0.750  0.625  0.873  1.0
  Sn  Sn11  1  0.750  0.962  0.862  1.0
  S  S12  1  0.250  0.165  0.874  1.0
  S  S13  1  0.250  0.497  0.876  1.0
  S  S14  1  0.250  0.836  0.878  1.0
  S  S15  1  0.250  0.996  0.369  1.0
  S  S16  1  0.250  0.342  0.358  1.0
  S  S17  1  0.250  0.670  0.348  1.0
  S  S18  1  0.750  0.190  0.153  1.0
  S  S19  1  0.750  0.504  0.153  1.0
  S  S20  1  0.750  0.837  0.157  1.0
  S  S21  1  0.750  0.978  0.655  1.0
  S  S22  1  0.750  0.312  0.657  1.0
  S  S23  1  0.750  0.646  0.658  1.0
[/CIF]
.
The material structure described by BaSn2S3 crystallizes in the monoclinic Pm space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to one S(1), one S(4), two equivalent S(10), and two equivalent S(11) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to two equivalent Sn(4), one S(2), one S(5), two equivalent S(11), and two equivalent S(12) atoms. In the third Ba site, Ba(3) is bonded in a 9-coordinate geometry to two equivalent Sn(5), one S(3), one S(4), one S(6), two equivalent S(10), and two equivalent S(12) atoms. In the fourth Ba site, Ba(4) is bonded in a 9-coordinate geometry to two equivalent Sn(8), one S(1), one S(3), one S(4), two equivalent S(7), and two equivalent S(9) atoms. There are eight inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 3-coordinate geometry to one S(5) and two equivalent S(8) atoms. In the second Sn site, Sn(2) is bonded in a distorted T-shaped geometry to one S(6) and two equivalent S(9) atoms. In the third Sn site, Sn(3) is bonded in a 3-coordinate geometry to one S(7) and two equivalent S(5) atoms. In the fourth Sn site, Sn(4) is bonded in a 3-coordinate geometry to two equivalent Ba(2), one S(8), and two equivalent S(6) atoms. In the fifth Sn site, Sn(5) is bonded in a 3-coordinate geometry to two equivalent Ba(3), one S(9), and two equivalent S(4) atoms. In the sixth Sn site, Sn(6) is bonded in a distorted T-shaped geometry to one S(11) and two equivalent S(1) atoms. In the seventh Sn site, Sn(7) is bonded in a distorted trigonal non-coplanar geometry to one S(12) and two equivalent S(2) atoms. In the eighth Sn site, Sn(8) is bonded in a 3-coordinate geometry to two equivalent Ba(4), one S(10), and two equivalent S(3) atoms. There are twelve inequivalent S sites. In the first S site, S(1) is bonded to one Ba(1), one Ba(4), and two equivalent Sn(6) atoms to form distorted SBa2Sn2 tetrahedra that share corners with two equivalent S(9)Ba2Sn3 square pyramids, corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(1)Ba2Sn2 tetrahedra, and edges with two equivalent S(11)Ba4Sn square pyramids. In the second S site, S(2) is bonded in a distorted T-shaped geometry to one Ba(2) and two equivalent Sn(7) atoms. In the third S site, S(3) is bonded in a 4-coordinate geometry to one Ba(3), one Ba(4), and two equivalent Sn(8) atoms. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(3), one Ba(4), and two equivalent Sn(5) atoms. In the fifth S site, S(5) is bonded in a 4-coordinate geometry to one Ba(2), one Sn(1), and two equivalent Sn(3) atoms. In the sixth S site, S(6) is bonded to one Ba(3), one Sn(2), and two equivalent Sn(4) atoms to form distorted SBaSn3 tetrahedra that share corners with two equivalent S(9)Ba2Sn3 square pyramids, corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(6)BaSn3 tetrahedra, and corners with two equivalent S(12)Ba4Sn trigonal bipyramids. In the seventh S site, S(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba(4) and one Sn(3) atom. In the eighth S site, S(8) is bonded in a trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(1) atoms. In the ninth S site, S(9) is bonded to two equivalent Ba(4), one Sn(5), and two equivalent Sn(2) atoms to form distorted SBa2Sn3 square pyramids that share corners with two equivalent S(1)Ba2Sn2 tetrahedra, corners with two equivalent S(6)BaSn3 tetrahedra, and edges with two equivalent S(9)Ba2Sn3 square pyramids. In the tenth S site, S(10) is bonded to two equivalent Ba(1), two equivalent Ba(3), and one Sn(8) atom to form SBa4Sn square pyramids that share corners with two equivalent S(11)Ba4Sn square pyramids, corners with two equivalent S(1)Ba2Sn2 tetrahedra, corners with two equivalent S(6)BaSn3 tetrahedra, corners with two equivalent S(12)Ba4Sn trigonal bipyramids,  an edgeedge with one S(11)Ba4Sn square pyramid, edges with two equivalent S(10)Ba4Sn square pyramids, and  an edgeedge with one S(12)Ba4Sn trigonal bipyramid. In the eleventh S site, S(11) is bonded to two equivalent Ba(1), two equivalent Ba(2), and one Sn(6) atom to form SBa4Sn square pyramids that share corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(12)Ba4Sn trigonal bipyramids,  an edgeedge with one S(10)Ba4Sn square pyramid, edges with two equivalent S(11)Ba4Sn square pyramids, edges with two equivalent S(1)Ba2Sn2 tetrahedra, and  an edgeedge with one S(12)Ba4Sn trigonal bipyramid. In the twelfth S site, S(12) is bonded to two equivalent Ba(2), two equivalent Ba(3), and one Sn(7) atom to form SBa4Sn trigonal bipyramids that share corners with two equivalent S(10)Ba4Sn square pyramids, corners with two equivalent S(11)Ba4Sn square pyramids, corners with two equivalent S(6)BaSn3 tetrahedra,  an edgeedge with one S(10)Ba4Sn square pyramid,  an edgeedge with one S(11)Ba4Sn square pyramid, and edges with two equivalent S(12)Ba4Sn trigonal bipyramids. is represented by the CIF file [CIF]
data_BaSn2S3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.274
_cell_length_b   13.156
_cell_length_c   11.985
_cell_angle_alpha   90.609
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   673.765
_cell_formula_units_Z   4
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
  Ba  Ba0  1  0.250  0.146  0.608  1.0
  Ba  Ba1  1  0.250  0.477  0.614  1.0
  Ba  Ba2  1  0.250  0.809  0.610  1.0
  Ba  Ba3  1  0.250  0.024  0.095  1.0
  Sn  Sn4  1  0.250  0.366  0.125  1.0
  Sn  Sn5  1  0.250  0.700  0.122  1.0
  Sn  Sn6  1  0.750  0.211  0.357  1.0
  Sn  Sn7  1  0.750  0.540  0.359  1.0
  Sn  Sn8  1  0.750  0.872  0.367  1.0
  Sn  Sn9  1  0.750  0.295  0.872  1.0
  Sn  Sn10  1  0.750  0.625  0.873  1.0
  Sn  Sn11  1  0.750  0.962  0.862  1.0
  S  S12  1  0.250  0.165  0.874  1.0
  S  S13  1  0.250  0.497  0.876  1.0
  S  S14  1  0.250  0.836  0.878  1.0
  S  S15  1  0.250  0.996  0.369  1.0
  S  S16  1  0.250  0.342  0.358  1.0
  S  S17  1  0.250  0.670  0.348  1.0
  S  S18  1  0.750  0.190  0.153  1.0
  S  S19  1  0.750  0.504  0.153  1.0
  S  S20  1  0.750  0.837  0.157  1.0
  S  S21  1  0.750  0.978  0.655  1.0
  S  S22  1  0.750  0.312  0.657  1.0
  S  S23  1  0.750  0.646  0.658  1.0
[/CIF]
.