The compound described by DyCu2Si2 crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded in a 16-coordinate geometry to eight equivalent Cu(1) and eight equivalent Si(1) atoms. Cu(1) is bonded to four equivalent Dy(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form a mixture of distorted corner, face, and edge-sharing CuDy4Cu4Si4 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), four equivalent Cu(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Dy(CuSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.947
_cell_length_b   3.947
_cell_length_c   5.695
_cell_angle_alpha   110.277
_cell_angle_beta   110.277
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   77.360
_cell_formula_units_Z   1
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
  Dy  Dy0  1  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.250  0.750  0.500  1.0
  Cu  Cu2  1  0.750  0.250  0.500  1.0
  Si  Si3  1  0.618  0.618  0.236  1.0
  Si  Si4  1  0.382  0.382  0.764  1.0
[/CIF]
.
The compound described by DyCu2Si2 crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded in a 16-coordinate geometry to eight equivalent Cu(1) and eight equivalent Si(1) atoms. Cu(1) is bonded to four equivalent Dy(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form a mixture of distorted corner, face, and edge-sharing CuDy4Cu4Si4 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), four equivalent Cu(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Dy(CuSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.947
_cell_length_b   3.947
_cell_length_c   5.695
_cell_angle_alpha   110.277
_cell_angle_beta   110.277
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   77.360
_cell_formula_units_Z   1
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
  Dy  Dy0  1  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.250  0.750  0.500  1.0
  Cu  Cu2  1  0.750  0.250  0.500  1.0
  Si  Si3  1  0.618  0.618  0.236  1.0
  Si  Si4  1  0.382  0.382  0.764  1.0
[/CIF]
.