The material described by U2CoSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent Co(1), two equivalent Si(3), four equivalent Si(1), and four equivalent Si(2) atoms to form UCo2Si10 cuboctahedra that share edges with four equivalent U(1)Co2Si10 cuboctahedra, edges with eight equivalent U(2)Co4Si8 cuboctahedra, faces with four equivalent U(1)Co2Si10 cuboctahedra, and faces with four equivalent U(2)Co4Si8 cuboctahedra. In the second U site, U(2) is bonded to four equivalent Co(1), two equivalent Si(1), two equivalent Si(2), and four equivalent Si(3) atoms to form UCo4Si8 cuboctahedra that share edges with four equivalent U(2)Co4Si8 cuboctahedra, edges with eight equivalent U(1)Co2Si10 cuboctahedra, faces with four equivalent U(1)Co2Si10 cuboctahedra, and faces with four equivalent U(2)Co4Si8 cuboctahedra. Co(1) is bonded in a 9-coordinate geometry to two equivalent U(1), four equivalent U(2), one Si(3), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), one Si(2), and two equivalent Si(3) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Co(1), and one Si(1) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent U(1), four equivalent U(2), one Co(1), and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_U2CoSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.726
_cell_length_b   4.025
_cell_length_c   6.893
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   103.356
_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  0.500  0.010  1.0
  U  U1  1  0.000  0.000  0.493  1.0
  Co  Co2  1  0.500  0.500  0.329  1.0
  Si  Si3  1  0.500  0.000  0.834  1.0
  Si  Si4  1  0.500  0.000  0.172  1.0
  Si  Si5  1  0.500  0.500  0.661  1.0
[/CIF]
.
The material described by U2CoSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent Co(1), two equivalent Si(3), four equivalent Si(1), and four equivalent Si(2) atoms to form UCo2Si10 cuboctahedra that share edges with four equivalent U(1)Co2Si10 cuboctahedra, edges with eight equivalent U(2)Co4Si8 cuboctahedra, faces with four equivalent U(1)Co2Si10 cuboctahedra, and faces with four equivalent U(2)Co4Si8 cuboctahedra. In the second U site, U(2) is bonded to four equivalent Co(1), two equivalent Si(1), two equivalent Si(2), and four equivalent Si(3) atoms to form UCo4Si8 cuboctahedra that share edges with four equivalent U(2)Co4Si8 cuboctahedra, edges with eight equivalent U(1)Co2Si10 cuboctahedra, faces with four equivalent U(1)Co2Si10 cuboctahedra, and faces with four equivalent U(2)Co4Si8 cuboctahedra. Co(1) is bonded in a 9-coordinate geometry to two equivalent U(1), four equivalent U(2), one Si(3), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), one Si(2), and two equivalent Si(3) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Co(1), and one Si(1) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent U(1), four equivalent U(2), one Co(1), and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_U2CoSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.726
_cell_length_b   4.025
_cell_length_c   6.893
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   103.356
_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  0.500  0.010  1.0
  U  U1  1  0.000  0.000  0.493  1.0
  Co  Co2  1  0.500  0.500  0.329  1.0
  Si  Si3  1  0.500  0.000  0.834  1.0
  Si  Si4  1  0.500  0.000  0.172  1.0
  Si  Si5  1  0.500  0.500  0.661  1.0
[/CIF]
.