The structure described by UCoCuSi2 crystallizes in the tetragonal I-4m2 space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Co(1), four equivalent Cu(1), and eight equivalent Si(1) atoms. Co(1) is bonded to four equivalent U(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form distorted CoU4Cu4Si4 cuboctahedra that share corners with four equivalent Cu(1)U4Co4Si4 cuboctahedra, corners with twelve equivalent Co(1)U4Cu4Si4 cuboctahedra, edges with two equivalent Cu(1)U4Co4Si4 cuboctahedra, faces with four equivalent Co(1)U4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)U4Co4Si4 cuboctahedra. Cu(1) is bonded to four equivalent U(1), four equivalent Co(1), and four equivalent Si(1) atoms to form distorted CuU4Co4Si4 cuboctahedra that share corners with four equivalent Co(1)U4Cu4Si4 cuboctahedra, corners with twelve equivalent Cu(1)U4Co4Si4 cuboctahedra, edges with two equivalent Co(1)U4Cu4Si4 cuboctahedra, faces with four equivalent Co(1)U4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)U4Co4Si4 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent U(1), two equivalent Co(1), two equivalent Cu(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_UCoCuSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.943
_cell_length_b   3.943
_cell_length_c   5.590
_cell_angle_alpha   69.347
_cell_angle_beta   69.347
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   75.330
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Co  Co1  1  0.750  0.250  0.500  1.0
  Cu  Cu2  1  0.250  0.750  0.500  1.0
  Si  Si3  1  0.380  0.380  0.241  1.0
  Si  Si4  1  0.620  0.620  0.759  1.0
[/CIF]
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The structure described by UCoCuSi2 crystallizes in the tetragonal I-4m2 space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Co(1), four equivalent Cu(1), and eight equivalent Si(1) atoms. Co(1) is bonded to four equivalent U(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form distorted CoU4Cu4Si4 cuboctahedra that share corners with four equivalent Cu(1)U4Co4Si4 cuboctahedra, corners with twelve equivalent Co(1)U4Cu4Si4 cuboctahedra, edges with two equivalent Cu(1)U4Co4Si4 cuboctahedra, faces with four equivalent Co(1)U4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)U4Co4Si4 cuboctahedra. Cu(1) is bonded to four equivalent U(1), four equivalent Co(1), and four equivalent Si(1) atoms to form distorted CuU4Co4Si4 cuboctahedra that share corners with four equivalent Co(1)U4Cu4Si4 cuboctahedra, corners with twelve equivalent Cu(1)U4Co4Si4 cuboctahedra, edges with two equivalent Co(1)U4Cu4Si4 cuboctahedra, faces with four equivalent Co(1)U4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)U4Co4Si4 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent U(1), two equivalent Co(1), two equivalent Cu(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_UCoCuSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.943
_cell_length_b   3.943
_cell_length_c   5.590
_cell_angle_alpha   69.347
_cell_angle_beta   69.347
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   75.330
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Co  Co1  1  0.750  0.250  0.500  1.0
  Cu  Cu2  1  0.250  0.750  0.500  1.0
  Si  Si3  1  0.380  0.380  0.241  1.0
  Si  Si4  1  0.620  0.620  0.759  1.0
[/CIF]
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