The structure described by BaSn2Bi crystallizes in the monoclinic Cm space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one Sn(3), two equivalent Sn(4), four equivalent Sn(5), one Bi(3), two equivalent Bi(1), and two equivalent Bi(2) atoms to form BaSn7Bi5 cuboctahedra that share corners with three equivalent Ba(4)Sn9Bi3 cuboctahedra, corners with six equivalent Ba(1)Sn7Bi5 cuboctahedra,  a faceface with one Ba(4)Sn9Bi3 cuboctahedra, faces with three equivalent Ba(3)Sn11Bi cuboctahedra, and faces with three equivalent Ba(2)Sn5Bi7 cuboctahedra. In the second Ba site, Ba(2) is bonded to one Sn(1), two equivalent Sn(2), two equivalent Sn(5), one Bi(1), two equivalent Bi(3), and four equivalent Bi(2) atoms to form BaSn5Bi7 cuboctahedra that share corners with three equivalent Ba(3)Sn11Bi cuboctahedra, corners with six equivalent Ba(2)Sn5Bi7 cuboctahedra,  a faceface with one Ba(3)Sn11Bi cuboctahedra, faces with three equivalent Ba(1)Sn7Bi5 cuboctahedra, and faces with three equivalent Ba(4)Sn9Bi3 cuboctahedra. In the third Ba site, Ba(3) is bonded to one Sn(1), two equivalent Sn(2), two equivalent Sn(3), two equivalent Sn(5), four equivalent Sn(4), and one Bi(1) atom to form distorted BaSn11Bi cuboctahedra that share corners with three equivalent Ba(2)Sn5Bi7 cuboctahedra, corners with six equivalent Ba(3)Sn11Bi cuboctahedra,  a faceface with one Ba(2)Sn5Bi7 cuboctahedra, faces with three equivalent Ba(1)Sn7Bi5 cuboctahedra, and faces with three equivalent Ba(4)Sn9Bi3 cuboctahedra. In the fourth Ba site, Ba(4) is bonded to one Sn(3), two equivalent Sn(1), two equivalent Sn(4), four equivalent Sn(2), one Bi(3), and two equivalent Bi(2) atoms to form distorted BaSn9Bi3 cuboctahedra that share corners with three equivalent Ba(1)Sn7Bi5 cuboctahedra, corners with six equivalent Ba(4)Sn9Bi3 cuboctahedra,  a faceface with one Ba(1)Sn7Bi5 cuboctahedra, faces with three equivalent Ba(3)Sn11Bi cuboctahedra, and faces with three equivalent Ba(2)Sn5Bi7 cuboctahedra. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(4), two equivalent Sn(2), two equivalent Sn(4), and two equivalent Bi(2) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(4), one Sn(1), one Sn(2), one Sn(3), one Sn(4), one Bi(2), and one Bi(3) atom. In the third Sn site, Sn(3) is bonded in a 10-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), two equivalent Sn(2), two equivalent Sn(4), and two equivalent Sn(5) atoms. In the fourth Sn site, Sn(4) is bonded in a 10-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Sn(1), one Sn(2), one Sn(3), one Sn(4), one Sn(5), and one Bi(1) atom. In the fifth Sn site, Sn(5) is bonded in a 4-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sn(3), and one Sn(4) atom. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted square co-planar geometry to one Ba(2), one Ba(3), two equivalent Ba(1), and two equivalent Sn(4) atoms. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(2), one Sn(1), and one Sn(2) atom. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(2), and two equivalent Sn(2) atoms. is represented by the CIF card [CIF]
data_BaSn2Bi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.315
_cell_length_b   7.315
_cell_length_c   12.231
_cell_angle_alpha   72.585
_cell_angle_beta   72.585
_cell_angle_gamma   59.964
_symmetry_Int_Tables_number   1
_cell_volume   531.635
_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  0.786  0.786  0.640  1.0
  Ba  Ba1  1  0.214  0.214  0.359  1.0
  Ba  Ba2  1  0.371  0.371  0.888  1.0
  Ba  Ba3  1  0.629  0.629  0.113  1.0
  Sn  Sn4  1  0.098  0.098  0.123  1.0
  Sn  Sn5  1  0.683  0.096  0.123  1.0
  Sn  Sn6  1  0.096  0.683  0.123  1.0
  Sn  Sn7  1  0.905  0.905  0.872  1.0
  Sn  Sn8  1  0.317  0.903  0.875  1.0
  Sn  Sn9  1  0.903  0.317  0.875  1.0
  Sn  Sn10  1  0.786  0.296  0.626  1.0
  Sn  Sn11  1  0.296  0.786  0.626  1.0
  Bi  Bi12  1  0.297  0.297  0.623  1.0
  Bi  Bi13  1  0.210  0.707  0.376  1.0
  Bi  Bi14  1  0.707  0.210  0.376  1.0
  Bi  Bi15  1  0.702  0.702  0.380  1.0
[/CIF]
.
The structure described by BaSn2Bi crystallizes in the monoclinic Cm space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one Sn(3), two equivalent Sn(4), four equivalent Sn(5), one Bi(3), two equivalent Bi(1), and two equivalent Bi(2) atoms to form BaSn7Bi5 cuboctahedra that share corners with three equivalent Ba(4)Sn9Bi3 cuboctahedra, corners with six equivalent Ba(1)Sn7Bi5 cuboctahedra,  a faceface with one Ba(4)Sn9Bi3 cuboctahedra, faces with three equivalent Ba(3)Sn11Bi cuboctahedra, and faces with three equivalent Ba(2)Sn5Bi7 cuboctahedra. In the second Ba site, Ba(2) is bonded to one Sn(1), two equivalent Sn(2), two equivalent Sn(5), one Bi(1), two equivalent Bi(3), and four equivalent Bi(2) atoms to form BaSn5Bi7 cuboctahedra that share corners with three equivalent Ba(3)Sn11Bi cuboctahedra, corners with six equivalent Ba(2)Sn5Bi7 cuboctahedra,  a faceface with one Ba(3)Sn11Bi cuboctahedra, faces with three equivalent Ba(1)Sn7Bi5 cuboctahedra, and faces with three equivalent Ba(4)Sn9Bi3 cuboctahedra. In the third Ba site, Ba(3) is bonded to one Sn(1), two equivalent Sn(2), two equivalent Sn(3), two equivalent Sn(5), four equivalent Sn(4), and one Bi(1) atom to form distorted BaSn11Bi cuboctahedra that share corners with three equivalent Ba(2)Sn5Bi7 cuboctahedra, corners with six equivalent Ba(3)Sn11Bi cuboctahedra,  a faceface with one Ba(2)Sn5Bi7 cuboctahedra, faces with three equivalent Ba(1)Sn7Bi5 cuboctahedra, and faces with three equivalent Ba(4)Sn9Bi3 cuboctahedra. In the fourth Ba site, Ba(4) is bonded to one Sn(3), two equivalent Sn(1), two equivalent Sn(4), four equivalent Sn(2), one Bi(3), and two equivalent Bi(2) atoms to form distorted BaSn9Bi3 cuboctahedra that share corners with three equivalent Ba(1)Sn7Bi5 cuboctahedra, corners with six equivalent Ba(4)Sn9Bi3 cuboctahedra,  a faceface with one Ba(1)Sn7Bi5 cuboctahedra, faces with three equivalent Ba(3)Sn11Bi cuboctahedra, and faces with three equivalent Ba(2)Sn5Bi7 cuboctahedra. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(4), two equivalent Sn(2), two equivalent Sn(4), and two equivalent Bi(2) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(4), one Sn(1), one Sn(2), one Sn(3), one Sn(4), one Bi(2), and one Bi(3) atom. In the third Sn site, Sn(3) is bonded in a 10-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), two equivalent Sn(2), two equivalent Sn(4), and two equivalent Sn(5) atoms. In the fourth Sn site, Sn(4) is bonded in a 10-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(3), one Sn(1), one Sn(2), one Sn(3), one Sn(4), one Sn(5), and one Bi(1) atom. In the fifth Sn site, Sn(5) is bonded in a 4-coordinate geometry to one Ba(2), one Ba(3), two equivalent Ba(1), one Sn(3), and one Sn(4) atom. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted square co-planar geometry to one Ba(2), one Ba(3), two equivalent Ba(1), and two equivalent Sn(4) atoms. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(2), one Sn(1), and one Sn(2) atom. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(4), two equivalent Ba(2), and two equivalent Sn(2) atoms. is represented by the CIF card [CIF]
data_BaSn2Bi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.315
_cell_length_b   7.315
_cell_length_c   12.231
_cell_angle_alpha   72.585
_cell_angle_beta   72.585
_cell_angle_gamma   59.964
_symmetry_Int_Tables_number   1
_cell_volume   531.635
_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  0.786  0.786  0.640  1.0
  Ba  Ba1  1  0.214  0.214  0.359  1.0
  Ba  Ba2  1  0.371  0.371  0.888  1.0
  Ba  Ba3  1  0.629  0.629  0.113  1.0
  Sn  Sn4  1  0.098  0.098  0.123  1.0
  Sn  Sn5  1  0.683  0.096  0.123  1.0
  Sn  Sn6  1  0.096  0.683  0.123  1.0
  Sn  Sn7  1  0.905  0.905  0.872  1.0
  Sn  Sn8  1  0.317  0.903  0.875  1.0
  Sn  Sn9  1  0.903  0.317  0.875  1.0
  Sn  Sn10  1  0.786  0.296  0.626  1.0
  Sn  Sn11  1  0.296  0.786  0.626  1.0
  Bi  Bi12  1  0.297  0.297  0.623  1.0
  Bi  Bi13  1  0.210  0.707  0.376  1.0
  Bi  Bi14  1  0.707  0.210  0.376  1.0
  Bi  Bi15  1  0.702  0.702  0.380  1.0
[/CIF]
.