The material structure described by Cu5Sn4 crystallizes in the monoclinic C2 space group. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 11-coordinate geometry to two equivalent Cu(3), two equivalent Cu(6), two equivalent Cu(7), one Sn(1), two equivalent Sn(4), and two equivalent Sn(6) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to one Cu(2), one Cu(3), one Cu(4), one Sn(2), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Sn(1), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(4) atoms. In the fourth Cu site, Cu(4) is bonded in a 11-coordinate geometry to one Cu(2), one Cu(3), one Cu(5), one Cu(6), one Cu(7), one Cu(8), one Sn(3), one Sn(4), one Sn(5), one Sn(6), and one Sn(7) atom. In the fifth Cu site, Cu(5) is bonded in a distorted q6 geometry to one Cu(4), one Cu(6), one Cu(8), one Sn(2), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. In the sixth Cu site, Cu(6) is bonded in a distorted q6 geometry to one Cu(1), one Cu(4), one Cu(5), one Cu(7), one Sn(1), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(4) atoms. In the seventh Cu site, Cu(7) is bonded in a 10-coordinate geometry to one Cu(1), one Cu(4), one Cu(6), one Cu(8), one Sn(1), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(4) atoms. In the eighth Cu site, Cu(8) is bonded in a distorted q6 geometry to one Cu(4), one Cu(5), one Cu(7), one Sn(2), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. There are seven inequivalent Sn sites. In the first Sn site, Sn(3) is bonded in a 7-coordinate geometry to one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), one Cu(7), and one Cu(8) atom. In the second Sn site, Sn(4) is bonded in a 8-coordinate geometry to one Cu(1), one Cu(4), two equivalent Cu(3), two equivalent Cu(6), and two equivalent Cu(7) atoms. In the third Sn site, Sn(5) is bonded in a 7-coordinate geometry to one Cu(4), two equivalent Cu(2), two equivalent Cu(5), and two equivalent Cu(8) atoms. In the fourth Sn site, Sn(6) is bonded in a 8-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), one Cu(7), and one Cu(8) atom. In the fifth Sn site, Sn(7) is bonded in a 7-coordinate geometry to one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), one Cu(7), and one Cu(8) atom. In the sixth Sn site, Sn(1) is bonded in a 7-coordinate geometry to one Cu(1), two equivalent Cu(3), two equivalent Cu(6), and two equivalent Cu(7) atoms. In the seventh Sn site, Sn(2) is bonded in a 6-coordinate geometry to two equivalent Cu(2), two equivalent Cu(5), and two equivalent Cu(8) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cu5Sn4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.331
_cell_length_b   7.331
_cell_length_c   10.132
_cell_angle_alpha   89.431
_cell_angle_beta   89.431
_cell_angle_gamma   59.876
_symmetry_Int_Tables_number   1
_cell_volume   471.021
_cell_formula_units_Z   3
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  0.679  0.321  0.000  1.0
  Cu  Cu1  1  0.023  0.993  0.377  1.0
  Cu  Cu2  1  0.007  0.977  0.623  1.0
  Cu  Cu3  1  0.005  0.009  0.126  1.0
  Cu  Cu4  1  0.991  0.995  0.874  1.0
  Cu  Cu5  1  0.026  0.314  0.251  1.0
  Cu  Cu6  1  0.686  0.974  0.749  1.0
  Cu  Cu7  1  0.338  0.313  0.377  1.0
  Cu  Cu8  1  0.687  0.662  0.623  1.0
  Cu  Cu9  1  0.353  0.316  0.126  1.0
  Cu  Cu10  1  0.684  0.647  0.874  1.0
  Cu  Cu11  1  0.701  0.620  0.126  1.0
  Cu  Cu12  1  0.380  0.299  0.874  1.0
  Cu  Cu13  1  0.702  0.633  0.377  1.0
  Cu  Cu14  1  0.367  0.298  0.623  1.0
  Sn  Sn15  1  0.323  0.677  0.000  1.0
  Sn  Sn16  1  0.350  0.650  0.500  1.0
  Sn  Sn17  1  0.377  0.951  0.248  1.0
  Sn  Sn18  1  0.049  0.623  0.752  1.0
  Sn  Sn19  1  0.686  0.957  0.019  1.0
  Sn  Sn20  1  0.043  0.314  0.981  1.0
  Sn  Sn21  1  0.687  0.976  0.480  1.0
  Sn  Sn22  1  0.024  0.313  0.520  1.0
  Sn  Sn23  1  0.662  0.320  0.269  1.0
  Sn  Sn24  1  0.680  0.338  0.731  1.0
  Sn  Sn25  1  0.027  0.671  0.249  1.0
  Sn  Sn26  1  0.329  0.973  0.751  1.0
[/CIF]
.
The material structure described by Cu5Sn4 crystallizes in the monoclinic C2 space group. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 11-coordinate geometry to two equivalent Cu(3), two equivalent Cu(6), two equivalent Cu(7), one Sn(1), two equivalent Sn(4), and two equivalent Sn(6) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to one Cu(2), one Cu(3), one Cu(4), one Sn(2), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Sn(1), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(4) atoms. In the fourth Cu site, Cu(4) is bonded in a 11-coordinate geometry to one Cu(2), one Cu(3), one Cu(5), one Cu(6), one Cu(7), one Cu(8), one Sn(3), one Sn(4), one Sn(5), one Sn(6), and one Sn(7) atom. In the fifth Cu site, Cu(5) is bonded in a distorted q6 geometry to one Cu(4), one Cu(6), one Cu(8), one Sn(2), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. In the sixth Cu site, Cu(6) is bonded in a distorted q6 geometry to one Cu(1), one Cu(4), one Cu(5), one Cu(7), one Sn(1), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(4) atoms. In the seventh Cu site, Cu(7) is bonded in a 10-coordinate geometry to one Cu(1), one Cu(4), one Cu(6), one Cu(8), one Sn(1), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(4) atoms. In the eighth Cu site, Cu(8) is bonded in a distorted q6 geometry to one Cu(4), one Cu(5), one Cu(7), one Sn(2), one Sn(3), one Sn(6), one Sn(7), and two equivalent Sn(5) atoms. There are seven inequivalent Sn sites. In the first Sn site, Sn(3) is bonded in a 7-coordinate geometry to one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), one Cu(7), and one Cu(8) atom. In the second Sn site, Sn(4) is bonded in a 8-coordinate geometry to one Cu(1), one Cu(4), two equivalent Cu(3), two equivalent Cu(6), and two equivalent Cu(7) atoms. In the third Sn site, Sn(5) is bonded in a 7-coordinate geometry to one Cu(4), two equivalent Cu(2), two equivalent Cu(5), and two equivalent Cu(8) atoms. In the fourth Sn site, Sn(6) is bonded in a 8-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), one Cu(7), and one Cu(8) atom. In the fifth Sn site, Sn(7) is bonded in a 7-coordinate geometry to one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), one Cu(7), and one Cu(8) atom. In the sixth Sn site, Sn(1) is bonded in a 7-coordinate geometry to one Cu(1), two equivalent Cu(3), two equivalent Cu(6), and two equivalent Cu(7) atoms. In the seventh Sn site, Sn(2) is bonded in a 6-coordinate geometry to two equivalent Cu(2), two equivalent Cu(5), and two equivalent Cu(8) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cu5Sn4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.331
_cell_length_b   7.331
_cell_length_c   10.132
_cell_angle_alpha   89.431
_cell_angle_beta   89.431
_cell_angle_gamma   59.876
_symmetry_Int_Tables_number   1
_cell_volume   471.021
_cell_formula_units_Z   3
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  0.679  0.321  0.000  1.0
  Cu  Cu1  1  0.023  0.993  0.377  1.0
  Cu  Cu2  1  0.007  0.977  0.623  1.0
  Cu  Cu3  1  0.005  0.009  0.126  1.0
  Cu  Cu4  1  0.991  0.995  0.874  1.0
  Cu  Cu5  1  0.026  0.314  0.251  1.0
  Cu  Cu6  1  0.686  0.974  0.749  1.0
  Cu  Cu7  1  0.338  0.313  0.377  1.0
  Cu  Cu8  1  0.687  0.662  0.623  1.0
  Cu  Cu9  1  0.353  0.316  0.126  1.0
  Cu  Cu10  1  0.684  0.647  0.874  1.0
  Cu  Cu11  1  0.701  0.620  0.126  1.0
  Cu  Cu12  1  0.380  0.299  0.874  1.0
  Cu  Cu13  1  0.702  0.633  0.377  1.0
  Cu  Cu14  1  0.367  0.298  0.623  1.0
  Sn  Sn15  1  0.323  0.677  0.000  1.0
  Sn  Sn16  1  0.350  0.650  0.500  1.0
  Sn  Sn17  1  0.377  0.951  0.248  1.0
  Sn  Sn18  1  0.049  0.623  0.752  1.0
  Sn  Sn19  1  0.686  0.957  0.019  1.0
  Sn  Sn20  1  0.043  0.314  0.981  1.0
  Sn  Sn21  1  0.687  0.976  0.480  1.0
  Sn  Sn22  1  0.024  0.313  0.520  1.0
  Sn  Sn23  1  0.662  0.320  0.269  1.0
  Sn  Sn24  1  0.680  0.338  0.731  1.0
  Sn  Sn25  1  0.027  0.671  0.249  1.0
  Sn  Sn26  1  0.329  0.973  0.751  1.0
[/CIF]
.