The material structure described by EuCuSi3 crystallizes in the tetragonal I-4m2 space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Si(2), and eight equivalent Si(1) atoms. Cu(1) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Si(1) atoms. 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 Cu(1), one Si(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuCuSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.597
_cell_length_b   5.597
_cell_length_c   5.597
_cell_angle_alpha   134.688
_cell_angle_beta   134.688
_cell_angle_gamma   66.015
_symmetry_Int_Tables_number   1
_cell_volume   87.251
_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  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.250  0.750  0.500  1.0
  Si  Si2  1  0.627  0.627  0.000  1.0
  Si  Si3  1  0.373  0.373  0.000  1.0
  Si  Si4  1  0.750  0.250  0.500  1.0
[/CIF]
.
The material structure described by EuCuSi3 crystallizes in the tetragonal I-4m2 space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Si(2), and eight equivalent Si(1) atoms. Cu(1) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Si(1) atoms. 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 Cu(1), one Si(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuCuSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.597
_cell_length_b   5.597
_cell_length_c   5.597
_cell_angle_alpha   134.688
_cell_angle_beta   134.688
_cell_angle_gamma   66.015
_symmetry_Int_Tables_number   1
_cell_volume   87.251
_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  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.250  0.750  0.500  1.0
  Si  Si2  1  0.627  0.627  0.000  1.0
  Si  Si3  1  0.373  0.373  0.000  1.0
  Si  Si4  1  0.750  0.250  0.500  1.0
[/CIF]
.