The crystal structure described by Eu2IrPd3Si4 crystallizes in the tetragonal P-4m2 space group. Eu(1) is bonded in a 16-coordinate geometry to two equivalent Ir(1), two equivalent Pd(1), two equivalent Pd(2), two equivalent Pd(3), four equivalent Si(1), and four equivalent Si(2) atoms. Ir(1) is bonded to four equivalent Eu(1) and four equivalent Si(1) atoms to form distorted IrEu4Si4 tetrahedra that share corners with four equivalent Pd(3)Eu4Si4 tetrahedra, corners with eight equivalent Pd(1)Eu4Si4 tetrahedra, edges with two equivalent Pd(3)Eu4Si4 tetrahedra, edges with four equivalent Ir(1)Eu4Si4 tetrahedra, and faces with four equivalent Pd(2)Eu4Si4 tetrahedra. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded to four equivalent Eu(1) and four equivalent Si(2) atoms to form distorted PdEu4Si4 tetrahedra that share corners with four equivalent Pd(2)Eu4Si4 tetrahedra, corners with eight equivalent Ir(1)Eu4Si4 tetrahedra, edges with two equivalent Pd(2)Eu4Si4 tetrahedra, edges with four equivalent Pd(1)Eu4Si4 tetrahedra, and faces with four equivalent Pd(3)Eu4Si4 tetrahedra. In the second Pd site, Pd(2) is bonded to four equivalent Eu(1) and four equivalent Si(1) atoms to form distorted PdEu4Si4 tetrahedra that share corners with four equivalent Pd(1)Eu4Si4 tetrahedra, corners with eight equivalent Pd(3)Eu4Si4 tetrahedra, edges with two equivalent Pd(1)Eu4Si4 tetrahedra, edges with four equivalent Pd(2)Eu4Si4 tetrahedra, and faces with four equivalent Ir(1)Eu4Si4 tetrahedra. In the third Pd site, Pd(3) is bonded to four equivalent Eu(1) and four equivalent Si(2) atoms to form distorted PdEu4Si4 tetrahedra that share corners with four equivalent Ir(1)Eu4Si4 tetrahedra, corners with eight equivalent Pd(2)Eu4Si4 tetrahedra, edges with two equivalent Ir(1)Eu4Si4 tetrahedra, edges with four equivalent Pd(3)Eu4Si4 tetrahedra, and faces with four equivalent Pd(1)Eu4Si4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), two equivalent Ir(1), two equivalent Pd(2), and one Si(2) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), two equivalent Pd(1), two equivalent Pd(3), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2Si4IrPd3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.216
_cell_length_b   4.216
_cell_length_c   10.163
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   180.604
_cell_formula_units_Z   1
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
  Eu  Eu0  1  0.500  0.000  0.750  1.0
  Eu  Eu1  1  0.000  0.500  0.250  1.0
  Si  Si2  1  0.000  0.500  0.873  1.0
  Si  Si3  1  0.500  0.000  0.371  1.0
  Si  Si4  1  0.500  0.000  0.127  1.0
  Si  Si5  1  0.000  0.500  0.629  1.0
  Ir  Ir6  1  0.500  0.500  0.000  1.0
  Pd  Pd7  1  0.000  0.000  0.500  1.0
  Pd  Pd8  1  0.000  0.000  0.000  1.0
  Pd  Pd9  1  0.500  0.500  0.500  1.0
[/CIF]
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The crystal structure described by Eu2IrPd3Si4 crystallizes in the tetragonal P-4m2 space group. Eu(1) is bonded in a 16-coordinate geometry to two equivalent Ir(1), two equivalent Pd(1), two equivalent Pd(2), two equivalent Pd(3), four equivalent Si(1), and four equivalent Si(2) atoms. Ir(1) is bonded to four equivalent Eu(1) and four equivalent Si(1) atoms to form distorted IrEu4Si4 tetrahedra that share corners with four equivalent Pd(3)Eu4Si4 tetrahedra, corners with eight equivalent Pd(1)Eu4Si4 tetrahedra, edges with two equivalent Pd(3)Eu4Si4 tetrahedra, edges with four equivalent Ir(1)Eu4Si4 tetrahedra, and faces with four equivalent Pd(2)Eu4Si4 tetrahedra. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded to four equivalent Eu(1) and four equivalent Si(2) atoms to form distorted PdEu4Si4 tetrahedra that share corners with four equivalent Pd(2)Eu4Si4 tetrahedra, corners with eight equivalent Ir(1)Eu4Si4 tetrahedra, edges with two equivalent Pd(2)Eu4Si4 tetrahedra, edges with four equivalent Pd(1)Eu4Si4 tetrahedra, and faces with four equivalent Pd(3)Eu4Si4 tetrahedra. In the second Pd site, Pd(2) is bonded to four equivalent Eu(1) and four equivalent Si(1) atoms to form distorted PdEu4Si4 tetrahedra that share corners with four equivalent Pd(1)Eu4Si4 tetrahedra, corners with eight equivalent Pd(3)Eu4Si4 tetrahedra, edges with two equivalent Pd(1)Eu4Si4 tetrahedra, edges with four equivalent Pd(2)Eu4Si4 tetrahedra, and faces with four equivalent Ir(1)Eu4Si4 tetrahedra. In the third Pd site, Pd(3) is bonded to four equivalent Eu(1) and four equivalent Si(2) atoms to form distorted PdEu4Si4 tetrahedra that share corners with four equivalent Ir(1)Eu4Si4 tetrahedra, corners with eight equivalent Pd(2)Eu4Si4 tetrahedra, edges with two equivalent Ir(1)Eu4Si4 tetrahedra, edges with four equivalent Pd(3)Eu4Si4 tetrahedra, and faces with four equivalent Pd(1)Eu4Si4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), two equivalent Ir(1), two equivalent Pd(2), and one Si(2) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), two equivalent Pd(1), two equivalent Pd(3), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2Si4IrPd3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.216
_cell_length_b   4.216
_cell_length_c   10.163
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   180.604
_cell_formula_units_Z   1
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
  Eu  Eu0  1  0.500  0.000  0.750  1.0
  Eu  Eu1  1  0.000  0.500  0.250  1.0
  Si  Si2  1  0.000  0.500  0.873  1.0
  Si  Si3  1  0.500  0.000  0.371  1.0
  Si  Si4  1  0.500  0.000  0.127  1.0
  Si  Si5  1  0.000  0.500  0.629  1.0
  Ir  Ir6  1  0.500  0.500  0.000  1.0
  Pd  Pd7  1  0.000  0.000  0.500  1.0
  Pd  Pd8  1  0.000  0.000  0.000  1.0
  Pd  Pd9  1  0.500  0.500  0.500  1.0
[/CIF]
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