The material structure described by EuNiSi2 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Si(2), and six equivalent Si(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Eu(1), one Ni(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_EuSi2Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.014
_cell_length_b   4.168
_cell_length_c   8.515
_cell_angle_alpha   104.168
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   138.150
_cell_formula_units_Z   2
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  0.250  0.393  0.785  1.0
  Eu  Eu1  1  0.750  0.607  0.215  1.0
  Si  Si2  1  0.250  0.041  0.083  1.0
  Si  Si3  1  0.750  0.959  0.917  1.0
  Si  Si4  1  0.250  0.750  0.500  1.0
  Si  Si5  1  0.750  0.250  0.500  1.0
  Ni  Ni6  1  0.250  0.181  0.362  1.0
  Ni  Ni7  1  0.750  0.819  0.638  1.0
[/CIF]
.
The material structure described by EuNiSi2 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Si(2), and six equivalent Si(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Eu(1), one Ni(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_EuSi2Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.014
_cell_length_b   4.168
_cell_length_c   8.515
_cell_angle_alpha   104.168
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   138.150
_cell_formula_units_Z   2
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  0.250  0.393  0.785  1.0
  Eu  Eu1  1  0.750  0.607  0.215  1.0
  Si  Si2  1  0.250  0.041  0.083  1.0
  Si  Si3  1  0.750  0.959  0.917  1.0
  Si  Si4  1  0.250  0.750  0.500  1.0
  Si  Si5  1  0.750  0.250  0.500  1.0
  Ni  Ni6  1  0.250  0.181  0.362  1.0
  Ni  Ni7  1  0.750  0.819  0.638  1.0
[/CIF]
.