The structure described by Y2Ni7Sn3 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the orthorhombic Cmce space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one Ni(4), two equivalent Ni(3), two equivalent Ni(5), six equivalent Ni(1), two equivalent Sn(2), and four equivalent Sn(1) atoms. In the second Y site, Y(2) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(3), four equivalent Ni(4), two equivalent Sn(2), and four equivalent Sn(3) atoms. There are five inequivalent Ni sites. In the first Ni site, Ni(4) is bonded in a 10-coordinate geometry to one Y(1), four equivalent Y(2), one Ni(2), two equivalent Sn(2), and two equivalent Sn(3) atoms. In the second Ni site, Ni(5) is bonded in a 12-coordinate geometry to two equivalent Y(1), one Ni(2), two equivalent Ni(1), four equivalent Ni(3), one Sn(3), and two equivalent Sn(1) atoms. In the third Ni site, Ni(1) is bonded in a 10-coordinate geometry to three equivalent Y(1), one Ni(1), one Ni(2), one Ni(3), one Ni(5), one Sn(2), and two equivalent Sn(1) atoms. In the fourth Ni site, Ni(2) is bonded in a 11-coordinate geometry to two equivalent Y(2), one Ni(4), one Ni(5), two equivalent Ni(1), two equivalent Ni(3), one Sn(3), and two equivalent Sn(2) atoms. In the fifth Ni site, Ni(3) is bonded in a 11-coordinate geometry to one Y(1), one Y(2), one Ni(1), one Ni(2), one Ni(3), two equivalent Ni(5), one Sn(1), one Sn(2), and two equivalent Sn(3) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 12-coordinate geometry to four equivalent Y(1), two equivalent Ni(3), two equivalent Ni(5), and four equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded to two equivalent Y(1), two equivalent Y(2), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), and two equivalent Ni(4) atoms to form a mixture of distorted corner and face-sharing SnY4Ni8 cuboctahedra. In the third Sn site, Sn(3) is bonded in a 12-coordinate geometry to four equivalent Y(2), one Ni(2), one Ni(5), two equivalent Ni(4), and four equivalent Ni(3) atoms. is represented by the CIF card [CIF]
data_Y2Ni7Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.606
_cell_length_b   8.639
_cell_length_c   12.615
_cell_angle_alpha   110.024
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   778.786
_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
  Y  Y0  1  0.427  0.194  0.388  1.0
  Y  Y1  1  0.573  0.806  0.612  1.0
  Y  Y2  1  0.927  0.306  0.612  1.0
  Y  Y3  1  0.073  0.694  0.388  1.0
  Y  Y4  1  0.500  0.292  0.000  1.0
  Y  Y5  1  0.000  0.792  0.000  1.0
  Y  Y6  1  0.500  0.708  0.000  1.0
  Y  Y7  1  0.000  0.208  0.000  1.0
  Ni  Ni8  1  0.422  0.549  0.395  1.0
  Ni  Ni9  1  0.578  0.154  0.605  1.0
  Ni  Ni10  1  0.922  0.654  0.605  1.0
  Ni  Ni11  1  0.078  0.049  0.395  1.0
  Ni  Ni12  1  0.578  0.451  0.605  1.0
  Ni  Ni13  1  0.422  0.846  0.395  1.0
  Ni  Ni14  1  0.078  0.346  0.395  1.0
  Ni  Ni15  1  0.922  0.951  0.605  1.0
  Ni  Ni16  1  0.445  0.601  0.201  1.0
  Ni  Ni17  1  0.555  0.399  0.799  1.0
  Ni  Ni18  1  0.945  0.899  0.799  1.0
  Ni  Ni19  1  0.055  0.101  0.201  1.0
  Ni  Ni20  1  0.593  0.357  0.234  1.0
  Ni  Ni21  1  0.407  0.123  0.766  1.0
  Ni  Ni22  1  0.093  0.623  0.766  1.0
  Ni  Ni23  1  0.907  0.857  0.234  1.0
  Ni  Ni24  1  0.407  0.643  0.766  1.0
  Ni  Ni25  1  0.593  0.877  0.234  1.0
  Ni  Ni26  1  0.907  0.377  0.234  1.0
  Ni  Ni27  1  0.093  0.143  0.766  1.0
  Ni  Ni28  1  0.350  0.047  0.094  1.0
  Ni  Ni29  1  0.650  0.953  0.906  1.0
  Ni  Ni30  1  0.850  0.453  0.906  1.0
  Ni  Ni31  1  0.150  0.547  0.094  1.0
  Ni  Ni32  1  0.311  0.335  0.670  1.0
  Ni  Ni33  1  0.689  0.665  0.330  1.0
  Ni  Ni34  1  0.811  0.165  0.330  1.0
  Ni  Ni35  1  0.189  0.835  0.670  1.0
  Sn  Sn36  1  0.250  0.531  0.563  1.0
  Sn  Sn37  1  0.750  0.969  0.437  1.0
  Sn  Sn38  1  0.750  0.469  0.437  1.0
  Sn  Sn39  1  0.250  0.031  0.563  1.0
  Sn  Sn40  1  0.250  0.356  0.212  1.0
  Sn  Sn41  1  0.750  0.144  0.788  1.0
  Sn  Sn42  1  0.750  0.644  0.788  1.0
  Sn  Sn43  1  0.250  0.856  0.212  1.0
  Sn  Sn44  1  0.298  0.938  0.875  1.0
  Sn  Sn45  1  0.702  0.062  0.125  1.0
  Sn  Sn46  1  0.798  0.562  0.125  1.0
  Sn  Sn47  1  0.202  0.438  0.875  1.0
[/CIF]
.
The structure described by Y2Ni7Sn3 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the orthorhombic Cmce space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one Ni(4), two equivalent Ni(3), two equivalent Ni(5), six equivalent Ni(1), two equivalent Sn(2), and four equivalent Sn(1) atoms. In the second Y site, Y(2) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(3), four equivalent Ni(4), two equivalent Sn(2), and four equivalent Sn(3) atoms. There are five inequivalent Ni sites. In the first Ni site, Ni(4) is bonded in a 10-coordinate geometry to one Y(1), four equivalent Y(2), one Ni(2), two equivalent Sn(2), and two equivalent Sn(3) atoms. In the second Ni site, Ni(5) is bonded in a 12-coordinate geometry to two equivalent Y(1), one Ni(2), two equivalent Ni(1), four equivalent Ni(3), one Sn(3), and two equivalent Sn(1) atoms. In the third Ni site, Ni(1) is bonded in a 10-coordinate geometry to three equivalent Y(1), one Ni(1), one Ni(2), one Ni(3), one Ni(5), one Sn(2), and two equivalent Sn(1) atoms. In the fourth Ni site, Ni(2) is bonded in a 11-coordinate geometry to two equivalent Y(2), one Ni(4), one Ni(5), two equivalent Ni(1), two equivalent Ni(3), one Sn(3), and two equivalent Sn(2) atoms. In the fifth Ni site, Ni(3) is bonded in a 11-coordinate geometry to one Y(1), one Y(2), one Ni(1), one Ni(2), one Ni(3), two equivalent Ni(5), one Sn(1), one Sn(2), and two equivalent Sn(3) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 12-coordinate geometry to four equivalent Y(1), two equivalent Ni(3), two equivalent Ni(5), and four equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded to two equivalent Y(1), two equivalent Y(2), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), and two equivalent Ni(4) atoms to form a mixture of distorted corner and face-sharing SnY4Ni8 cuboctahedra. In the third Sn site, Sn(3) is bonded in a 12-coordinate geometry to four equivalent Y(2), one Ni(2), one Ni(5), two equivalent Ni(4), and four equivalent Ni(3) atoms. is represented by the CIF card [CIF]
data_Y2Ni7Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.606
_cell_length_b   8.639
_cell_length_c   12.615
_cell_angle_alpha   110.024
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   778.786
_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
  Y  Y0  1  0.427  0.194  0.388  1.0
  Y  Y1  1  0.573  0.806  0.612  1.0
  Y  Y2  1  0.927  0.306  0.612  1.0
  Y  Y3  1  0.073  0.694  0.388  1.0
  Y  Y4  1  0.500  0.292  0.000  1.0
  Y  Y5  1  0.000  0.792  0.000  1.0
  Y  Y6  1  0.500  0.708  0.000  1.0
  Y  Y7  1  0.000  0.208  0.000  1.0
  Ni  Ni8  1  0.422  0.549  0.395  1.0
  Ni  Ni9  1  0.578  0.154  0.605  1.0
  Ni  Ni10  1  0.922  0.654  0.605  1.0
  Ni  Ni11  1  0.078  0.049  0.395  1.0
  Ni  Ni12  1  0.578  0.451  0.605  1.0
  Ni  Ni13  1  0.422  0.846  0.395  1.0
  Ni  Ni14  1  0.078  0.346  0.395  1.0
  Ni  Ni15  1  0.922  0.951  0.605  1.0
  Ni  Ni16  1  0.445  0.601  0.201  1.0
  Ni  Ni17  1  0.555  0.399  0.799  1.0
  Ni  Ni18  1  0.945  0.899  0.799  1.0
  Ni  Ni19  1  0.055  0.101  0.201  1.0
  Ni  Ni20  1  0.593  0.357  0.234  1.0
  Ni  Ni21  1  0.407  0.123  0.766  1.0
  Ni  Ni22  1  0.093  0.623  0.766  1.0
  Ni  Ni23  1  0.907  0.857  0.234  1.0
  Ni  Ni24  1  0.407  0.643  0.766  1.0
  Ni  Ni25  1  0.593  0.877  0.234  1.0
  Ni  Ni26  1  0.907  0.377  0.234  1.0
  Ni  Ni27  1  0.093  0.143  0.766  1.0
  Ni  Ni28  1  0.350  0.047  0.094  1.0
  Ni  Ni29  1  0.650  0.953  0.906  1.0
  Ni  Ni30  1  0.850  0.453  0.906  1.0
  Ni  Ni31  1  0.150  0.547  0.094  1.0
  Ni  Ni32  1  0.311  0.335  0.670  1.0
  Ni  Ni33  1  0.689  0.665  0.330  1.0
  Ni  Ni34  1  0.811  0.165  0.330  1.0
  Ni  Ni35  1  0.189  0.835  0.670  1.0
  Sn  Sn36  1  0.250  0.531  0.563  1.0
  Sn  Sn37  1  0.750  0.969  0.437  1.0
  Sn  Sn38  1  0.750  0.469  0.437  1.0
  Sn  Sn39  1  0.250  0.031  0.563  1.0
  Sn  Sn40  1  0.250  0.356  0.212  1.0
  Sn  Sn41  1  0.750  0.144  0.788  1.0
  Sn  Sn42  1  0.750  0.644  0.788  1.0
  Sn  Sn43  1  0.250  0.856  0.212  1.0
  Sn  Sn44  1  0.298  0.938  0.875  1.0
  Sn  Sn45  1  0.702  0.062  0.125  1.0
  Sn  Sn46  1  0.798  0.562  0.125  1.0
  Sn  Sn47  1  0.202  0.438  0.875  1.0
[/CIF]
.