The crystal structure described by Ce2Pt7Si4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 16-coordinate geometry to one Pt(5), one Pt(7), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), three equivalent Pt(4), two equivalent Si(4), and three equivalent Si(1) atoms. In the second Ce site, Ce(2) is bonded in a 17-coordinate geometry to one Pt(2), one Pt(3), one Pt(5), two equivalent Pt(1), three equivalent Pt(6), three equivalent Pt(7), two equivalent Si(2), two equivalent Si(3), and two equivalent Si(4) atoms. There are seven inequivalent Pt sites. In the first Pt site, Pt(6) is bonded in a 2-coordinate geometry to three equivalent Ce(2), one Si(3), and three equivalent Si(2) atoms. In the second Pt site, Pt(7) is bonded to one Ce(1), three equivalent Ce(2), one Si(3), and three equivalent Si(4) atoms to form a mixture of distorted face and edge-sharing PtCe4Si4 tetrahedra. In the third Pt site, Pt(1) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), one Si(2), and one Si(4) atom. In the fourth Pt site, Pt(2) is bonded in a 6-coordinate geometry to one Ce(2), two equivalent Ce(1), one Si(1), one Si(4), and two equivalent Si(3) atoms. In the fifth Pt site, Pt(3) is bonded in a 3-coordinate geometry to one Ce(2), two equivalent Ce(1), one Si(1), and two equivalent Si(2) atoms. In the sixth Pt site, Pt(4) is bonded in a 5-coordinate geometry to three equivalent Ce(1), one Si(3), and two equivalent Si(1) atoms. In the seventh Pt site, Pt(5) is bonded in a 3-coordinate geometry to one Ce(1), one Ce(2), one Si(2), and two equivalent Si(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to three equivalent Ce(1), one Pt(2), one Pt(3), and two equivalent Pt(4) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ce(2), one Pt(1), one Pt(5), two equivalent Pt(3), and three equivalent Pt(6) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Ce(2), one Pt(4), one Pt(6), one Pt(7), two equivalent Pt(2), and two equivalent Pt(5) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), one Pt(1), one Pt(2), and three equivalent Pt(7) atoms. is represented by the CIF card [CIF]
data_Ce2Si4Pt7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.051
_cell_length_b   11.315
_cell_length_c   19.811
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   907.993
_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
  Ce  Ce0  1  0.250  0.979  0.718  1.0
  Ce  Ce1  1  0.250  0.521  0.218  1.0
  Ce  Ce2  1  0.750  0.479  0.782  1.0
  Ce  Ce3  1  0.750  0.243  0.471  1.0
  Ce  Ce4  1  0.250  0.743  0.029  1.0
  Ce  Ce5  1  0.250  0.757  0.529  1.0
  Ce  Ce6  1  0.750  0.257  0.971  1.0
  Ce  Ce7  1  0.750  0.021  0.282  1.0
  Si  Si8  1  0.250  0.800  0.245  1.0
  Si  Si9  1  0.750  0.575  0.587  1.0
  Si  Si10  1  0.250  0.425  0.413  1.0
  Si  Si11  1  0.750  0.200  0.755  1.0
  Si  Si12  1  0.750  0.748  0.906  1.0
  Si  Si13  1  0.250  0.061  0.415  1.0
  Si  Si14  1  0.250  0.248  0.594  1.0
  Si  Si15  1  0.250  0.439  0.915  1.0
  Si  Si16  1  0.750  0.939  0.585  1.0
  Si  Si17  1  0.750  0.752  0.406  1.0
  Si  Si18  1  0.750  0.561  0.085  1.0
  Si  Si19  1  0.250  0.252  0.094  1.0
  Si  Si20  1  0.750  0.300  0.255  1.0
  Si  Si21  1  0.250  0.075  0.913  1.0
  Si  Si22  1  0.750  0.925  0.087  1.0
  Si  Si23  1  0.250  0.700  0.745  1.0
  Pt  Pt24  1  0.250  0.259  0.851  1.0
  Pt  Pt25  1  0.250  0.629  0.863  1.0
  Pt  Pt26  1  0.750  0.442  0.341  1.0
  Pt  Pt27  1  0.750  0.806  0.785  1.0
  Pt  Pt28  1  0.250  0.621  0.372  1.0
  Pt  Pt29  1  0.250  0.879  0.872  1.0
  Pt  Pt30  1  0.250  0.241  0.351  1.0
  Pt  Pt31  1  0.750  0.058  0.841  1.0
  Pt  Pt32  1  0.250  0.434  0.533  1.0
  Pt  Pt33  1  0.250  0.066  0.033  1.0
  Pt  Pt34  1  0.750  0.551  0.959  1.0
  Pt  Pt35  1  0.750  0.949  0.459  1.0
  Pt  Pt36  1  0.750  0.379  0.628  1.0
  Pt  Pt37  1  0.250  0.558  0.659  1.0
  Pt  Pt38  1  0.250  0.871  0.363  1.0
  Pt  Pt39  1  0.750  0.566  0.467  1.0
  Pt  Pt40  1  0.250  0.194  0.215  1.0
  Pt  Pt41  1  0.250  0.306  0.715  1.0
  Pt  Pt42  1  0.750  0.741  0.149  1.0
  Pt  Pt43  1  0.250  0.942  0.159  1.0
  Pt  Pt44  1  0.750  0.121  0.128  1.0
  Pt  Pt45  1  0.750  0.934  0.967  1.0
  Pt  Pt46  1  0.750  0.759  0.649  1.0
  Pt  Pt47  1  0.750  0.371  0.137  1.0
  Pt  Pt48  1  0.250  0.051  0.541  1.0
  Pt  Pt49  1  0.750  0.129  0.637  1.0
  Pt  Pt50  1  0.750  0.694  0.285  1.0
  Pt  Pt51  1  0.250  0.449  0.041  1.0
[/CIF]
.
The crystal structure described by Ce2Pt7Si4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 16-coordinate geometry to one Pt(5), one Pt(7), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), three equivalent Pt(4), two equivalent Si(4), and three equivalent Si(1) atoms. In the second Ce site, Ce(2) is bonded in a 17-coordinate geometry to one Pt(2), one Pt(3), one Pt(5), two equivalent Pt(1), three equivalent Pt(6), three equivalent Pt(7), two equivalent Si(2), two equivalent Si(3), and two equivalent Si(4) atoms. There are seven inequivalent Pt sites. In the first Pt site, Pt(6) is bonded in a 2-coordinate geometry to three equivalent Ce(2), one Si(3), and three equivalent Si(2) atoms. In the second Pt site, Pt(7) is bonded to one Ce(1), three equivalent Ce(2), one Si(3), and three equivalent Si(4) atoms to form a mixture of distorted face and edge-sharing PtCe4Si4 tetrahedra. In the third Pt site, Pt(1) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), one Si(2), and one Si(4) atom. In the fourth Pt site, Pt(2) is bonded in a 6-coordinate geometry to one Ce(2), two equivalent Ce(1), one Si(1), one Si(4), and two equivalent Si(3) atoms. In the fifth Pt site, Pt(3) is bonded in a 3-coordinate geometry to one Ce(2), two equivalent Ce(1), one Si(1), and two equivalent Si(2) atoms. In the sixth Pt site, Pt(4) is bonded in a 5-coordinate geometry to three equivalent Ce(1), one Si(3), and two equivalent Si(1) atoms. In the seventh Pt site, Pt(5) is bonded in a 3-coordinate geometry to one Ce(1), one Ce(2), one Si(2), and two equivalent Si(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to three equivalent Ce(1), one Pt(2), one Pt(3), and two equivalent Pt(4) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ce(2), one Pt(1), one Pt(5), two equivalent Pt(3), and three equivalent Pt(6) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Ce(2), one Pt(4), one Pt(6), one Pt(7), two equivalent Pt(2), and two equivalent Pt(5) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), one Pt(1), one Pt(2), and three equivalent Pt(7) atoms. is represented by the CIF card [CIF]
data_Ce2Si4Pt7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.051
_cell_length_b   11.315
_cell_length_c   19.811
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   907.993
_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
  Ce  Ce0  1  0.250  0.979  0.718  1.0
  Ce  Ce1  1  0.250  0.521  0.218  1.0
  Ce  Ce2  1  0.750  0.479  0.782  1.0
  Ce  Ce3  1  0.750  0.243  0.471  1.0
  Ce  Ce4  1  0.250  0.743  0.029  1.0
  Ce  Ce5  1  0.250  0.757  0.529  1.0
  Ce  Ce6  1  0.750  0.257  0.971  1.0
  Ce  Ce7  1  0.750  0.021  0.282  1.0
  Si  Si8  1  0.250  0.800  0.245  1.0
  Si  Si9  1  0.750  0.575  0.587  1.0
  Si  Si10  1  0.250  0.425  0.413  1.0
  Si  Si11  1  0.750  0.200  0.755  1.0
  Si  Si12  1  0.750  0.748  0.906  1.0
  Si  Si13  1  0.250  0.061  0.415  1.0
  Si  Si14  1  0.250  0.248  0.594  1.0
  Si  Si15  1  0.250  0.439  0.915  1.0
  Si  Si16  1  0.750  0.939  0.585  1.0
  Si  Si17  1  0.750  0.752  0.406  1.0
  Si  Si18  1  0.750  0.561  0.085  1.0
  Si  Si19  1  0.250  0.252  0.094  1.0
  Si  Si20  1  0.750  0.300  0.255  1.0
  Si  Si21  1  0.250  0.075  0.913  1.0
  Si  Si22  1  0.750  0.925  0.087  1.0
  Si  Si23  1  0.250  0.700  0.745  1.0
  Pt  Pt24  1  0.250  0.259  0.851  1.0
  Pt  Pt25  1  0.250  0.629  0.863  1.0
  Pt  Pt26  1  0.750  0.442  0.341  1.0
  Pt  Pt27  1  0.750  0.806  0.785  1.0
  Pt  Pt28  1  0.250  0.621  0.372  1.0
  Pt  Pt29  1  0.250  0.879  0.872  1.0
  Pt  Pt30  1  0.250  0.241  0.351  1.0
  Pt  Pt31  1  0.750  0.058  0.841  1.0
  Pt  Pt32  1  0.250  0.434  0.533  1.0
  Pt  Pt33  1  0.250  0.066  0.033  1.0
  Pt  Pt34  1  0.750  0.551  0.959  1.0
  Pt  Pt35  1  0.750  0.949  0.459  1.0
  Pt  Pt36  1  0.750  0.379  0.628  1.0
  Pt  Pt37  1  0.250  0.558  0.659  1.0
  Pt  Pt38  1  0.250  0.871  0.363  1.0
  Pt  Pt39  1  0.750  0.566  0.467  1.0
  Pt  Pt40  1  0.250  0.194  0.215  1.0
  Pt  Pt41  1  0.250  0.306  0.715  1.0
  Pt  Pt42  1  0.750  0.741  0.149  1.0
  Pt  Pt43  1  0.250  0.942  0.159  1.0
  Pt  Pt44  1  0.750  0.121  0.128  1.0
  Pt  Pt45  1  0.750  0.934  0.967  1.0
  Pt  Pt46  1  0.750  0.759  0.649  1.0
  Pt  Pt47  1  0.750  0.371  0.137  1.0
  Pt  Pt48  1  0.250  0.051  0.541  1.0
  Pt  Pt49  1  0.750  0.129  0.637  1.0
  Pt  Pt50  1  0.750  0.694  0.285  1.0
  Pt  Pt51  1  0.250  0.449  0.041  1.0
[/CIF]
.