The material structure described by ErCo5Si3 crystallizes in the hexagonal P6_3/m space group. Er(1) is bonded in a 12-coordinate geometry to two equivalent Co(3), three equivalent Co(2), three equivalent Co(4), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to two equivalent Co(2), two equivalent Co(4), one Si(3), and four equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to three equivalent Er(1), one Co(4), two equivalent Co(1), two equivalent Co(2), one Si(1), and three equivalent Si(3) atoms. In the third Co site, Co(3) is bonded in a 4-coordinate geometry to two equivalent Er(1), one Co(5), two equivalent Co(4), one Si(3), and three equivalent Si(2) atoms. In the fourth Co site, Co(4) is bonded in a 12-coordinate geometry to three equivalent Er(1), one Co(2), two equivalent Co(1), two equivalent Co(3), one Si(1), one Si(2), and two equivalent Si(3) atoms. In the fifth Co site, Co(5) is bonded in a 8-coordinate geometry to one Co(3), four equivalent Co(5), and three equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to two equivalent Er(1), one Co(2), one Co(4), four equivalent Co(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Co(4), three equivalent Co(3), and three equivalent Co(5) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Co(1), one Co(3), two equivalent Co(4), and three equivalent Co(2) atoms. is represented by the CIF file [CIF]
data_ErCo5Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.627
_cell_length_b   14.627
_cell_length_c   3.662
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   678.551
_cell_formula_units_Z   6
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  0.294  0.899  0.750  1.0
  Er  Er1  1  0.101  0.395  0.750  1.0
  Er  Er2  1  0.605  0.706  0.750  1.0
  Er  Er3  1  0.706  0.101  0.250  1.0
  Er  Er4  1  0.899  0.605  0.250  1.0
  Er  Er5  1  0.395  0.294  0.250  1.0
  Co  Co6  1  0.428  0.775  0.750  1.0
  Co  Co7  1  0.225  0.653  0.750  1.0
  Co  Co8  1  0.347  0.572  0.750  1.0
  Co  Co9  1  0.572  0.225  0.250  1.0
  Co  Co10  1  0.775  0.347  0.250  1.0
  Co  Co11  1  0.653  0.428  0.250  1.0
  Co  Co12  1  0.534  0.074  0.750  1.0
  Co  Co13  1  0.926  0.459  0.750  1.0
  Co  Co14  1  0.541  0.466  0.750  1.0
  Co  Co15  1  0.466  0.926  0.250  1.0
  Co  Co16  1  0.074  0.541  0.250  1.0
  Co  Co17  1  0.459  0.534  0.250  1.0
  Co  Co18  1  0.049  0.781  0.750  1.0
  Co  Co19  1  0.219  0.268  0.750  1.0
  Co  Co20  1  0.732  0.951  0.750  1.0
  Co  Co21  1  0.951  0.219  0.250  1.0
  Co  Co22  1  0.781  0.732  0.250  1.0
  Co  Co23  1  0.268  0.049  0.250  1.0
  Co  Co24  1  0.735  0.586  0.750  1.0
  Co  Co25  1  0.414  0.148  0.750  1.0
  Co  Co26  1  0.852  0.265  0.750  1.0
  Co  Co27  1  0.265  0.414  0.250  1.0
  Co  Co28  1  0.586  0.852  0.250  1.0
  Co  Co29  1  0.148  0.735  0.250  1.0
  Co  Co30  1  0.100  0.972  0.750  1.0
  Co  Co31  1  0.028  0.129  0.750  1.0
  Co  Co32  1  0.871  0.900  0.750  1.0
  Co  Co33  1  0.900  0.028  0.250  1.0
  Co  Co34  1  0.972  0.871  0.250  1.0
  Co  Co35  1  0.129  0.100  0.250  1.0
  Si  Si36  1  0.682  0.239  0.750  1.0
  Si  Si37  1  0.761  0.443  0.750  1.0
  Si  Si38  1  0.557  0.318  0.750  1.0
  Si  Si39  1  0.318  0.761  0.250  1.0
  Si  Si40  1  0.239  0.557  0.250  1.0
  Si  Si41  1  0.443  0.682  0.250  1.0
  Si  Si42  1  0.883  0.752  0.750  1.0
  Si  Si43  1  0.248  0.131  0.750  1.0
  Si  Si44  1  0.869  0.117  0.750  1.0
  Si  Si45  1  0.117  0.248  0.250  1.0
  Si  Si46  1  0.752  0.869  0.250  1.0
  Si  Si47  1  0.131  0.883  0.250  1.0
  Si  Si48  1  0.062  0.630  0.750  1.0
  Si  Si49  1  0.370  0.432  0.750  1.0
  Si  Si50  1  0.568  0.938  0.750  1.0
  Si  Si51  1  0.938  0.370  0.250  1.0
  Si  Si52  1  0.630  0.568  0.250  1.0
  Si  Si53  1  0.432  0.062  0.250  1.0
[/CIF]
.
The material structure described by ErCo5Si3 crystallizes in the hexagonal P6_3/m space group. Er(1) is bonded in a 12-coordinate geometry to two equivalent Co(3), three equivalent Co(2), three equivalent Co(4), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to two equivalent Co(2), two equivalent Co(4), one Si(3), and four equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to three equivalent Er(1), one Co(4), two equivalent Co(1), two equivalent Co(2), one Si(1), and three equivalent Si(3) atoms. In the third Co site, Co(3) is bonded in a 4-coordinate geometry to two equivalent Er(1), one Co(5), two equivalent Co(4), one Si(3), and three equivalent Si(2) atoms. In the fourth Co site, Co(4) is bonded in a 12-coordinate geometry to three equivalent Er(1), one Co(2), two equivalent Co(1), two equivalent Co(3), one Si(1), one Si(2), and two equivalent Si(3) atoms. In the fifth Co site, Co(5) is bonded in a 8-coordinate geometry to one Co(3), four equivalent Co(5), and three equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to two equivalent Er(1), one Co(2), one Co(4), four equivalent Co(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Co(4), three equivalent Co(3), and three equivalent Co(5) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Co(1), one Co(3), two equivalent Co(4), and three equivalent Co(2) atoms. is represented by the CIF file [CIF]
data_ErCo5Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.627
_cell_length_b   14.627
_cell_length_c   3.662
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   678.551
_cell_formula_units_Z   6
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  0.294  0.899  0.750  1.0
  Er  Er1  1  0.101  0.395  0.750  1.0
  Er  Er2  1  0.605  0.706  0.750  1.0
  Er  Er3  1  0.706  0.101  0.250  1.0
  Er  Er4  1  0.899  0.605  0.250  1.0
  Er  Er5  1  0.395  0.294  0.250  1.0
  Co  Co6  1  0.428  0.775  0.750  1.0
  Co  Co7  1  0.225  0.653  0.750  1.0
  Co  Co8  1  0.347  0.572  0.750  1.0
  Co  Co9  1  0.572  0.225  0.250  1.0
  Co  Co10  1  0.775  0.347  0.250  1.0
  Co  Co11  1  0.653  0.428  0.250  1.0
  Co  Co12  1  0.534  0.074  0.750  1.0
  Co  Co13  1  0.926  0.459  0.750  1.0
  Co  Co14  1  0.541  0.466  0.750  1.0
  Co  Co15  1  0.466  0.926  0.250  1.0
  Co  Co16  1  0.074  0.541  0.250  1.0
  Co  Co17  1  0.459  0.534  0.250  1.0
  Co  Co18  1  0.049  0.781  0.750  1.0
  Co  Co19  1  0.219  0.268  0.750  1.0
  Co  Co20  1  0.732  0.951  0.750  1.0
  Co  Co21  1  0.951  0.219  0.250  1.0
  Co  Co22  1  0.781  0.732  0.250  1.0
  Co  Co23  1  0.268  0.049  0.250  1.0
  Co  Co24  1  0.735  0.586  0.750  1.0
  Co  Co25  1  0.414  0.148  0.750  1.0
  Co  Co26  1  0.852  0.265  0.750  1.0
  Co  Co27  1  0.265  0.414  0.250  1.0
  Co  Co28  1  0.586  0.852  0.250  1.0
  Co  Co29  1  0.148  0.735  0.250  1.0
  Co  Co30  1  0.100  0.972  0.750  1.0
  Co  Co31  1  0.028  0.129  0.750  1.0
  Co  Co32  1  0.871  0.900  0.750  1.0
  Co  Co33  1  0.900  0.028  0.250  1.0
  Co  Co34  1  0.972  0.871  0.250  1.0
  Co  Co35  1  0.129  0.100  0.250  1.0
  Si  Si36  1  0.682  0.239  0.750  1.0
  Si  Si37  1  0.761  0.443  0.750  1.0
  Si  Si38  1  0.557  0.318  0.750  1.0
  Si  Si39  1  0.318  0.761  0.250  1.0
  Si  Si40  1  0.239  0.557  0.250  1.0
  Si  Si41  1  0.443  0.682  0.250  1.0
  Si  Si42  1  0.883  0.752  0.750  1.0
  Si  Si43  1  0.248  0.131  0.750  1.0
  Si  Si44  1  0.869  0.117  0.750  1.0
  Si  Si45  1  0.117  0.248  0.250  1.0
  Si  Si46  1  0.752  0.869  0.250  1.0
  Si  Si47  1  0.131  0.883  0.250  1.0
  Si  Si48  1  0.062  0.630  0.750  1.0
  Si  Si49  1  0.370  0.432  0.750  1.0
  Si  Si50  1  0.568  0.938  0.750  1.0
  Si  Si51  1  0.938  0.370  0.250  1.0
  Si  Si52  1  0.630  0.568  0.250  1.0
  Si  Si53  1  0.432  0.062  0.250  1.0
[/CIF]
.