The crystal structure described by Pd9Si2 crystallizes in the orthorhombic Pnma space group. There are six inequivalent Pd sites. In the first Pd site, Pd(4) is bonded in a distorted water-like geometry to two equivalent Pd(1), one Si(1), and one Si(2) atom. In the second Pd site, Pd(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Pd(1) and two equivalent Si(2) atoms. In the third Pd site, Pd(1) is bonded in a 13-coordinate geometry to one Pd(1), one Pd(4), one Pd(5), two equivalent Pd(2), two equivalent Pd(6), three equivalent Pd(3), one Si(2), and two equivalent Si(1) atoms. In the fourth Pd site, Pd(6) is bonded in a distorted water-like geometry to four equivalent Pd(1), one Si(1), and one Si(2) atom. In the fifth Pd site, Pd(2) is bonded in a 2-coordinate geometry to two equivalent Pd(1), one Si(1), and one Si(2) atom. In the sixth Pd site, Pd(3) is bonded in a distorted water-like geometry to three equivalent Pd(1), one Si(1), and one Si(2) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to one Pd(4), one Pd(6), two equivalent Pd(2), two equivalent Pd(3), and four equivalent Pd(1) atoms. In the second Si site, Si(2) is bonded in a 10-coordinate geometry to one Pd(4), one Pd(6), two equivalent Pd(1), two equivalent Pd(2), two equivalent Pd(3), and two equivalent Pd(5) atoms. is represented by the CIF file [CIF]
data_Si2Pd9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.468
_cell_length_b   9.083
_cell_length_c   9.471
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.442
_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
  Si  Si0  1  0.750  0.631  0.789  1.0
  Si  Si1  1  0.250  0.369  0.211  1.0
  Si  Si2  1  0.750  0.131  0.711  1.0
  Si  Si3  1  0.250  0.869  0.289  1.0
  Si  Si4  1  0.750  0.773  0.179  1.0
  Si  Si5  1  0.250  0.227  0.821  1.0
  Si  Si6  1  0.750  0.273  0.321  1.0
  Si  Si7  1  0.250  0.727  0.679  1.0
  Pd  Pd8  1  0.934  0.898  0.681  1.0
  Pd  Pd9  1  0.434  0.102  0.319  1.0
  Pd  Pd10  1  0.566  0.398  0.819  1.0
  Pd  Pd11  1  0.066  0.602  0.181  1.0
  Pd  Pd12  1  0.066  0.102  0.319  1.0
  Pd  Pd13  1  0.566  0.898  0.681  1.0
  Pd  Pd14  1  0.434  0.602  0.181  1.0
  Pd  Pd15  1  0.934  0.398  0.819  1.0
  Pd  Pd16  1  0.943  0.612  0.594  1.0
  Pd  Pd17  1  0.443  0.388  0.406  1.0
  Pd  Pd18  1  0.557  0.112  0.906  1.0
  Pd  Pd19  1  0.057  0.888  0.094  1.0
  Pd  Pd20  1  0.057  0.388  0.406  1.0
  Pd  Pd21  1  0.557  0.612  0.594  1.0
  Pd  Pd22  1  0.443  0.888  0.094  1.0
  Pd  Pd23  1  0.943  0.112  0.906  1.0
  Pd  Pd24  1  0.941  0.818  0.378  1.0
  Pd  Pd25  1  0.441  0.182  0.622  1.0
  Pd  Pd26  1  0.559  0.318  0.122  1.0
  Pd  Pd27  1  0.059  0.682  0.878  1.0
  Pd  Pd28  1  0.059  0.182  0.622  1.0
  Pd  Pd29  1  0.559  0.818  0.378  1.0
  Pd  Pd30  1  0.441  0.682  0.878  1.0
  Pd  Pd31  1  0.941  0.318  0.122  1.0
  Pd  Pd32  1  0.750  0.851  0.933  1.0
  Pd  Pd33  1  0.250  0.149  0.067  1.0
  Pd  Pd34  1  0.750  0.351  0.567  1.0
  Pd  Pd35  1  0.250  0.649  0.433  1.0
  Pd  Pd36  1  0.750  0.551  0.336  1.0
  Pd  Pd37  1  0.250  0.449  0.664  1.0
  Pd  Pd38  1  0.750  0.051  0.164  1.0
  Pd  Pd39  1  0.250  0.949  0.836  1.0
  Pd  Pd40  1  0.750  0.560  0.031  1.0
  Pd  Pd41  1  0.250  0.440  0.969  1.0
  Pd  Pd42  1  0.750  0.060  0.469  1.0
  Pd  Pd43  1  0.250  0.940  0.531  1.0
[/CIF]
.
The crystal structure described by Pd9Si2 crystallizes in the orthorhombic Pnma space group. There are six inequivalent Pd sites. In the first Pd site, Pd(4) is bonded in a distorted water-like geometry to two equivalent Pd(1), one Si(1), and one Si(2) atom. In the second Pd site, Pd(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Pd(1) and two equivalent Si(2) atoms. In the third Pd site, Pd(1) is bonded in a 13-coordinate geometry to one Pd(1), one Pd(4), one Pd(5), two equivalent Pd(2), two equivalent Pd(6), three equivalent Pd(3), one Si(2), and two equivalent Si(1) atoms. In the fourth Pd site, Pd(6) is bonded in a distorted water-like geometry to four equivalent Pd(1), one Si(1), and one Si(2) atom. In the fifth Pd site, Pd(2) is bonded in a 2-coordinate geometry to two equivalent Pd(1), one Si(1), and one Si(2) atom. In the sixth Pd site, Pd(3) is bonded in a distorted water-like geometry to three equivalent Pd(1), one Si(1), and one Si(2) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to one Pd(4), one Pd(6), two equivalent Pd(2), two equivalent Pd(3), and four equivalent Pd(1) atoms. In the second Si site, Si(2) is bonded in a 10-coordinate geometry to one Pd(4), one Pd(6), two equivalent Pd(1), two equivalent Pd(2), two equivalent Pd(3), and two equivalent Pd(5) atoms. is represented by the CIF file [CIF]
data_Si2Pd9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.468
_cell_length_b   9.083
_cell_length_c   9.471
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.442
_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
  Si  Si0  1  0.750  0.631  0.789  1.0
  Si  Si1  1  0.250  0.369  0.211  1.0
  Si  Si2  1  0.750  0.131  0.711  1.0
  Si  Si3  1  0.250  0.869  0.289  1.0
  Si  Si4  1  0.750  0.773  0.179  1.0
  Si  Si5  1  0.250  0.227  0.821  1.0
  Si  Si6  1  0.750  0.273  0.321  1.0
  Si  Si7  1  0.250  0.727  0.679  1.0
  Pd  Pd8  1  0.934  0.898  0.681  1.0
  Pd  Pd9  1  0.434  0.102  0.319  1.0
  Pd  Pd10  1  0.566  0.398  0.819  1.0
  Pd  Pd11  1  0.066  0.602  0.181  1.0
  Pd  Pd12  1  0.066  0.102  0.319  1.0
  Pd  Pd13  1  0.566  0.898  0.681  1.0
  Pd  Pd14  1  0.434  0.602  0.181  1.0
  Pd  Pd15  1  0.934  0.398  0.819  1.0
  Pd  Pd16  1  0.943  0.612  0.594  1.0
  Pd  Pd17  1  0.443  0.388  0.406  1.0
  Pd  Pd18  1  0.557  0.112  0.906  1.0
  Pd  Pd19  1  0.057  0.888  0.094  1.0
  Pd  Pd20  1  0.057  0.388  0.406  1.0
  Pd  Pd21  1  0.557  0.612  0.594  1.0
  Pd  Pd22  1  0.443  0.888  0.094  1.0
  Pd  Pd23  1  0.943  0.112  0.906  1.0
  Pd  Pd24  1  0.941  0.818  0.378  1.0
  Pd  Pd25  1  0.441  0.182  0.622  1.0
  Pd  Pd26  1  0.559  0.318  0.122  1.0
  Pd  Pd27  1  0.059  0.682  0.878  1.0
  Pd  Pd28  1  0.059  0.182  0.622  1.0
  Pd  Pd29  1  0.559  0.818  0.378  1.0
  Pd  Pd30  1  0.441  0.682  0.878  1.0
  Pd  Pd31  1  0.941  0.318  0.122  1.0
  Pd  Pd32  1  0.750  0.851  0.933  1.0
  Pd  Pd33  1  0.250  0.149  0.067  1.0
  Pd  Pd34  1  0.750  0.351  0.567  1.0
  Pd  Pd35  1  0.250  0.649  0.433  1.0
  Pd  Pd36  1  0.750  0.551  0.336  1.0
  Pd  Pd37  1  0.250  0.449  0.664  1.0
  Pd  Pd38  1  0.750  0.051  0.164  1.0
  Pd  Pd39  1  0.250  0.949  0.836  1.0
  Pd  Pd40  1  0.750  0.560  0.031  1.0
  Pd  Pd41  1  0.250  0.440  0.969  1.0
  Pd  Pd42  1  0.750  0.060  0.469  1.0
  Pd  Pd43  1  0.250  0.940  0.531  1.0
[/CIF]
.