The structure described by ErCo3Si2 crystallizes in the orthorhombic Imma space group. Er(1) is bonded in a 20-coordinate geometry to two equivalent Er(1), four equivalent Co(1), eight equivalent Co(2), and six equivalent Si(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to four equivalent Er(1), four equivalent Co(2), and four equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing CoEr4Co4Si4 cuboctahedra. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to four equivalent Er(1), two equivalent Co(1), and four equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to three equivalent Er(1), two equivalent Co(1), four equivalent Co(2), and one Si(1) atom. is represented by the CIF card [CIF]
data_ErCo3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.184
_cell_length_b   6.184
_cell_length_c   6.184
_cell_angle_alpha   130.400
_cell_angle_beta   113.541
_cell_angle_gamma   87.276
_symmetry_Int_Tables_number   1
_cell_volume   157.333
_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  0.250  0.535  0.285  1.0
  Er  Er1  1  0.750  0.465  0.715  1.0
  Co  Co2  1  0.000  0.000  0.500  1.0
  Co  Co3  1  0.500  0.000  0.000  1.0
  Co  Co4  1  0.721  0.000  0.721  1.0
  Co  Co5  1  0.221  0.500  0.721  1.0
  Co  Co6  1  0.279  0.000  0.279  1.0
  Co  Co7  1  0.779  0.500  0.279  1.0
  Si  Si8  1  0.080  0.877  0.797  1.0
  Si  Si9  1  0.920  0.123  0.203  1.0
  Si  Si10  1  0.580  0.783  0.203  1.0
  Si  Si11  1  0.420  0.217  0.797  1.0
[/CIF]
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The structure described by ErCo3Si2 crystallizes in the orthorhombic Imma space group. Er(1) is bonded in a 20-coordinate geometry to two equivalent Er(1), four equivalent Co(1), eight equivalent Co(2), and six equivalent Si(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to four equivalent Er(1), four equivalent Co(2), and four equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing CoEr4Co4Si4 cuboctahedra. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to four equivalent Er(1), two equivalent Co(1), and four equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to three equivalent Er(1), two equivalent Co(1), four equivalent Co(2), and one Si(1) atom. is represented by the CIF card [CIF]
data_ErCo3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.184
_cell_length_b   6.184
_cell_length_c   6.184
_cell_angle_alpha   130.400
_cell_angle_beta   113.541
_cell_angle_gamma   87.276
_symmetry_Int_Tables_number   1
_cell_volume   157.333
_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  0.250  0.535  0.285  1.0
  Er  Er1  1  0.750  0.465  0.715  1.0
  Co  Co2  1  0.000  0.000  0.500  1.0
  Co  Co3  1  0.500  0.000  0.000  1.0
  Co  Co4  1  0.721  0.000  0.721  1.0
  Co  Co5  1  0.221  0.500  0.721  1.0
  Co  Co6  1  0.279  0.000  0.279  1.0
  Co  Co7  1  0.779  0.500  0.279  1.0
  Si  Si8  1  0.080  0.877  0.797  1.0
  Si  Si9  1  0.920  0.123  0.203  1.0
  Si  Si10  1  0.580  0.783  0.203  1.0
  Si  Si11  1  0.420  0.217  0.797  1.0
[/CIF]
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