The material described by Er2Co3Si5 crystallizes in the orthorhombic Ibam space group. Er(1) is bonded in a 13-coordinate geometry to two equivalent Co(1), three equivalent Co(2), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to four equivalent Er(1), two equivalent Co(1), two equivalent Si(2), and four equivalent Si(3) atoms to form a mixture of distorted corner and face-sharing CoEr4Co2Si6 cuboctahedra. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to three equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent Co(2) atoms. In the second Si site, Si(2) is bonded in a 11-coordinate geometry to four equivalent Er(1), one Co(1), two equivalent Co(2), two equivalent Si(2), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Co(2), two equivalent Co(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_Er2Co3Si5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.472
_cell_length_b   7.803
_cell_length_c   7.803
_cell_angle_alpha   73.950
_cell_angle_beta   69.473
_cell_angle_gamma   69.473
_symmetry_Int_Tables_number   1
_cell_volume   287.718
_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
  Er  Er0  1  0.365  0.868  0.402  1.0
  Er  Er1  1  0.635  0.132  0.598  1.0
  Er  Er2  1  0.865  0.402  0.868  1.0
  Er  Er3  1  0.135  0.598  0.132  1.0
  Co  Co4  1  0.750  0.000  0.000  1.0
  Co  Co5  1  0.250  0.000  0.000  1.0
  Co  Co6  1  0.139  0.254  0.468  1.0
  Co  Co7  1  0.861  0.746  0.532  1.0
  Co  Co8  1  0.639  0.468  0.254  1.0
  Co  Co9  1  0.361  0.532  0.746  1.0
  Si  Si10  1  0.750  0.500  0.500  1.0
  Si  Si11  1  0.250  0.500  0.500  1.0
  Si  Si12  1  0.525  0.225  0.225  1.0
  Si  Si13  1  0.975  0.775  0.775  1.0
  Si  Si14  1  0.475  0.775  0.775  1.0
  Si  Si15  1  0.025  0.225  0.225  1.0
  Si  Si16  1  0.100  0.060  0.741  1.0
  Si  Si17  1  0.900  0.940  0.259  1.0
  Si  Si18  1  0.600  0.741  0.060  1.0
  Si  Si19  1  0.400  0.259  0.940  1.0
[/CIF]
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The material described by Er2Co3Si5 crystallizes in the orthorhombic Ibam space group. Er(1) is bonded in a 13-coordinate geometry to two equivalent Co(1), three equivalent Co(2), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to four equivalent Er(1), two equivalent Co(1), two equivalent Si(2), and four equivalent Si(3) atoms to form a mixture of distorted corner and face-sharing CoEr4Co2Si6 cuboctahedra. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to three equivalent Er(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent Co(2) atoms. In the second Si site, Si(2) is bonded in a 11-coordinate geometry to four equivalent Er(1), one Co(1), two equivalent Co(2), two equivalent Si(2), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Co(2), two equivalent Co(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_Er2Co3Si5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.472
_cell_length_b   7.803
_cell_length_c   7.803
_cell_angle_alpha   73.950
_cell_angle_beta   69.473
_cell_angle_gamma   69.473
_symmetry_Int_Tables_number   1
_cell_volume   287.718
_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
  Er  Er0  1  0.365  0.868  0.402  1.0
  Er  Er1  1  0.635  0.132  0.598  1.0
  Er  Er2  1  0.865  0.402  0.868  1.0
  Er  Er3  1  0.135  0.598  0.132  1.0
  Co  Co4  1  0.750  0.000  0.000  1.0
  Co  Co5  1  0.250  0.000  0.000  1.0
  Co  Co6  1  0.139  0.254  0.468  1.0
  Co  Co7  1  0.861  0.746  0.532  1.0
  Co  Co8  1  0.639  0.468  0.254  1.0
  Co  Co9  1  0.361  0.532  0.746  1.0
  Si  Si10  1  0.750  0.500  0.500  1.0
  Si  Si11  1  0.250  0.500  0.500  1.0
  Si  Si12  1  0.525  0.225  0.225  1.0
  Si  Si13  1  0.975  0.775  0.775  1.0
  Si  Si14  1  0.475  0.775  0.775  1.0
  Si  Si15  1  0.025  0.225  0.225  1.0
  Si  Si16  1  0.100  0.060  0.741  1.0
  Si  Si17  1  0.900  0.940  0.259  1.0
  Si  Si18  1  0.600  0.741  0.060  1.0
  Si  Si19  1  0.400  0.259  0.940  1.0
[/CIF]
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