The compound described by Cu10Sn3 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the hexagonal P6_3 space group. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted q6 geometry to one Cu(4), one Cu(6), three equivalent Cu(2), three equivalent Cu(5), and three equivalent Sn(1) atoms. In the second Cu site, Cu(2) is bonded to one Cu(1), one Cu(3), one Cu(4), one Cu(6), four equivalent Cu(5), and four equivalent Sn(1) atoms to form distorted CuCu8Sn4 cuboctahedra that share corners with two equivalent Cu(3)Cu6Sn6 cuboctahedra, corners with eight equivalent Cu(5)Cu8Sn4 cuboctahedra,  an edgeedge with one Cu(3)Cu6Sn6 cuboctahedra, edges with two equivalent Cu(5)Cu8Sn4 cuboctahedra, edges with six equivalent Cu(2)Cu8Sn4 cuboctahedra, faces with two equivalent Cu(3)Cu6Sn6 cuboctahedra, faces with four equivalent Cu(5)Cu8Sn4 cuboctahedra, and faces with six equivalent Cu(2)Cu8Sn4 cuboctahedra. In the third Cu site, Cu(3) is bonded to three equivalent Cu(2), three equivalent Cu(5), and six equivalent Sn(1) atoms to form CuCu6Sn6 cuboctahedra that share corners with six equivalent Cu(2)Cu8Sn4 cuboctahedra, corners with six equivalent Cu(5)Cu8Sn4 cuboctahedra, edges with three equivalent Cu(2)Cu8Sn4 cuboctahedra, edges with three equivalent Cu(5)Cu8Sn4 cuboctahedra, faces with two equivalent Cu(3)Cu6Sn6 cuboctahedra, faces with six equivalent Cu(2)Cu8Sn4 cuboctahedra, and faces with six equivalent Cu(5)Cu8Sn4 cuboctahedra. In the fourth Cu site, Cu(4) is bonded in a 11-coordinate geometry to one Cu(1), one Cu(6), three equivalent Cu(2), three equivalent Cu(5), and three equivalent Sn(1) atoms. In the fifth Cu site, Cu(5) is bonded to one Cu(1), one Cu(3), one Cu(4), one Cu(6), four equivalent Cu(2), and four equivalent Sn(1) atoms to form distorted CuCu8Sn4 cuboctahedra that share corners with two equivalent Cu(3)Cu6Sn6 cuboctahedra, corners with eight equivalent Cu(2)Cu8Sn4 cuboctahedra,  an edgeedge with one Cu(3)Cu6Sn6 cuboctahedra, edges with two equivalent Cu(2)Cu8Sn4 cuboctahedra, edges with six equivalent Cu(5)Cu8Sn4 cuboctahedra, faces with two equivalent Cu(3)Cu6Sn6 cuboctahedra, faces with four equivalent Cu(2)Cu8Sn4 cuboctahedra, and faces with six equivalent Cu(5)Cu8Sn4 cuboctahedra. In the sixth Cu site, Cu(6) is bonded in a distorted q6 geometry to one Cu(1), one Cu(4), three equivalent Cu(2), three equivalent Cu(5), and three equivalent Sn(1) atoms. Sn(1) is bonded in a 13-coordinate geometry to one Cu(1), one Cu(4), one Cu(6), two equivalent Cu(3), four equivalent Cu(2), and four equivalent Cu(5) atoms. is represented by the CIF card [CIF]
data_Cu10Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.269
_cell_length_b   7.269
_cell_length_c   7.874
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   360.306
_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
  Cu  Cu0  1  0.667  0.333  0.574  1.0
  Cu  Cu1  1  0.970  0.329  0.413  1.0
  Cu  Cu2  1  0.359  0.030  0.413  1.0
  Cu  Cu3  1  0.641  0.970  0.913  1.0
  Cu  Cu4  1  0.000  0.000  0.494  1.0
  Cu  Cu5  1  0.667  0.333  0.247  1.0
  Cu  Cu6  1  0.030  0.671  0.579  1.0
  Cu  Cu7  1  0.333  0.667  0.747  1.0
  Cu  Cu8  1  0.333  0.667  0.074  1.0
  Cu  Cu9  1  0.333  0.667  0.420  1.0
  Cu  Cu10  1  0.030  0.671  0.913  1.0
  Cu  Cu11  1  0.667  0.333  0.920  1.0
  Cu  Cu12  1  0.642  0.970  0.579  1.0
  Cu  Cu13  1  0.671  0.641  0.413  1.0
  Cu  Cu14  1  0.329  0.358  0.579  1.0
  Cu  Cu15  1  0.358  0.030  0.079  1.0
  Cu  Cu16  1  0.671  0.642  0.079  1.0
  Cu  Cu17  1  0.329  0.359  0.913  1.0
  Cu  Cu18  1  0.970  0.329  0.079  1.0
  Cu  Cu19  1  0.000  0.000  0.994  1.0
  Sn  Sn20  1  0.683  0.977  0.246  1.0
  Sn  Sn21  1  0.023  0.706  0.246  1.0
  Sn  Sn22  1  0.317  0.023  0.746  1.0
  Sn  Sn23  1  0.977  0.294  0.746  1.0
  Sn  Sn24  1  0.294  0.317  0.246  1.0
  Sn  Sn25  1  0.706  0.683  0.746  1.0
[/CIF]
.
The compound described by Cu10Sn3 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the hexagonal P6_3 space group. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted q6 geometry to one Cu(4), one Cu(6), three equivalent Cu(2), three equivalent Cu(5), and three equivalent Sn(1) atoms. In the second Cu site, Cu(2) is bonded to one Cu(1), one Cu(3), one Cu(4), one Cu(6), four equivalent Cu(5), and four equivalent Sn(1) atoms to form distorted CuCu8Sn4 cuboctahedra that share corners with two equivalent Cu(3)Cu6Sn6 cuboctahedra, corners with eight equivalent Cu(5)Cu8Sn4 cuboctahedra,  an edgeedge with one Cu(3)Cu6Sn6 cuboctahedra, edges with two equivalent Cu(5)Cu8Sn4 cuboctahedra, edges with six equivalent Cu(2)Cu8Sn4 cuboctahedra, faces with two equivalent Cu(3)Cu6Sn6 cuboctahedra, faces with four equivalent Cu(5)Cu8Sn4 cuboctahedra, and faces with six equivalent Cu(2)Cu8Sn4 cuboctahedra. In the third Cu site, Cu(3) is bonded to three equivalent Cu(2), three equivalent Cu(5), and six equivalent Sn(1) atoms to form CuCu6Sn6 cuboctahedra that share corners with six equivalent Cu(2)Cu8Sn4 cuboctahedra, corners with six equivalent Cu(5)Cu8Sn4 cuboctahedra, edges with three equivalent Cu(2)Cu8Sn4 cuboctahedra, edges with three equivalent Cu(5)Cu8Sn4 cuboctahedra, faces with two equivalent Cu(3)Cu6Sn6 cuboctahedra, faces with six equivalent Cu(2)Cu8Sn4 cuboctahedra, and faces with six equivalent Cu(5)Cu8Sn4 cuboctahedra. In the fourth Cu site, Cu(4) is bonded in a 11-coordinate geometry to one Cu(1), one Cu(6), three equivalent Cu(2), three equivalent Cu(5), and three equivalent Sn(1) atoms. In the fifth Cu site, Cu(5) is bonded to one Cu(1), one Cu(3), one Cu(4), one Cu(6), four equivalent Cu(2), and four equivalent Sn(1) atoms to form distorted CuCu8Sn4 cuboctahedra that share corners with two equivalent Cu(3)Cu6Sn6 cuboctahedra, corners with eight equivalent Cu(2)Cu8Sn4 cuboctahedra,  an edgeedge with one Cu(3)Cu6Sn6 cuboctahedra, edges with two equivalent Cu(2)Cu8Sn4 cuboctahedra, edges with six equivalent Cu(5)Cu8Sn4 cuboctahedra, faces with two equivalent Cu(3)Cu6Sn6 cuboctahedra, faces with four equivalent Cu(2)Cu8Sn4 cuboctahedra, and faces with six equivalent Cu(5)Cu8Sn4 cuboctahedra. In the sixth Cu site, Cu(6) is bonded in a distorted q6 geometry to one Cu(1), one Cu(4), three equivalent Cu(2), three equivalent Cu(5), and three equivalent Sn(1) atoms. Sn(1) is bonded in a 13-coordinate geometry to one Cu(1), one Cu(4), one Cu(6), two equivalent Cu(3), four equivalent Cu(2), and four equivalent Cu(5) atoms. is represented by the CIF card [CIF]
data_Cu10Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.269
_cell_length_b   7.269
_cell_length_c   7.874
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   360.306
_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
  Cu  Cu0  1  0.667  0.333  0.574  1.0
  Cu  Cu1  1  0.970  0.329  0.413  1.0
  Cu  Cu2  1  0.359  0.030  0.413  1.0
  Cu  Cu3  1  0.641  0.970  0.913  1.0
  Cu  Cu4  1  0.000  0.000  0.494  1.0
  Cu  Cu5  1  0.667  0.333  0.247  1.0
  Cu  Cu6  1  0.030  0.671  0.579  1.0
  Cu  Cu7  1  0.333  0.667  0.747  1.0
  Cu  Cu8  1  0.333  0.667  0.074  1.0
  Cu  Cu9  1  0.333  0.667  0.420  1.0
  Cu  Cu10  1  0.030  0.671  0.913  1.0
  Cu  Cu11  1  0.667  0.333  0.920  1.0
  Cu  Cu12  1  0.642  0.970  0.579  1.0
  Cu  Cu13  1  0.671  0.641  0.413  1.0
  Cu  Cu14  1  0.329  0.358  0.579  1.0
  Cu  Cu15  1  0.358  0.030  0.079  1.0
  Cu  Cu16  1  0.671  0.642  0.079  1.0
  Cu  Cu17  1  0.329  0.359  0.913  1.0
  Cu  Cu18  1  0.970  0.329  0.079  1.0
  Cu  Cu19  1  0.000  0.000  0.994  1.0
  Sn  Sn20  1  0.683  0.977  0.246  1.0
  Sn  Sn21  1  0.023  0.706  0.246  1.0
  Sn  Sn22  1  0.317  0.023  0.746  1.0
  Sn  Sn23  1  0.977  0.294  0.746  1.0
  Sn  Sn24  1  0.294  0.317  0.246  1.0
  Sn  Sn25  1  0.706  0.683  0.746  1.0
[/CIF]
.