The structure described by ErCuSi is hexagonal omega structure-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to six equivalent Cu(1) and six equivalent Si(1) atoms to form a mixture of face and edge-sharing ErCu6Si6 cuboctahedra. Cu(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Cu(1) atoms. is represented by the CIF card [CIF]
data_ErCuSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.091
_cell_length_b   4.091
_cell_length_c   7.402
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   107.268
_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  0.000  0.000  0.500  1.0
  Er  Er1  1  0.000  0.000  0.000  1.0
  Cu  Cu2  1  0.333  0.667  0.250  1.0
  Cu  Cu3  1  0.667  0.333  0.750  1.0
  Si  Si4  1  0.667  0.333  0.250  1.0
  Si  Si5  1  0.333  0.667  0.750  1.0
[/CIF]
.
The structure described by ErCuSi is hexagonal omega structure-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to six equivalent Cu(1) and six equivalent Si(1) atoms to form a mixture of face and edge-sharing ErCu6Si6 cuboctahedra. Cu(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Cu(1) atoms. is represented by the CIF card [CIF]
data_ErCuSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.091
_cell_length_b   4.091
_cell_length_c   7.402
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   107.268
_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  0.000  0.000  0.500  1.0
  Er  Er1  1  0.000  0.000  0.000  1.0
  Cu  Cu2  1  0.333  0.667  0.250  1.0
  Cu  Cu3  1  0.667  0.333  0.750  1.0
  Si  Si4  1  0.667  0.333  0.250  1.0
  Si  Si5  1  0.333  0.667  0.750  1.0
[/CIF]
.