The structure described by UFe5Co5Si2 crystallizes in the monoclinic Cm space group. U(1) is bonded in a 20-coordinate geometry to two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(4), four equivalent Fe(1), one Co(1), one Co(2), one Co(3), one Co(4), two equivalent Co(5), and four equivalent Si(1) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent U(1), one Fe(2), one Fe(3), one Fe(4), two equivalent Fe(1), one Co(1), one Co(2), one Co(3), one Co(4), and one Co(5) atom to form distorted FeU2Fe5Co5 cuboctahedra that share corners with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, corners with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, corners with six equivalent Fe(1)U2Fe5Co5 cuboctahedra,  an edgeedge with one Fe(3)U2Fe3Co5Si2 cuboctahedra, edges with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, faces with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, faces with two equivalent Fe(1)U2Fe5Co5 cuboctahedra, and faces with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent U(1), one Fe(4), two equivalent Fe(1), one Co(3), one Co(4), one Co(5), two equivalent Co(2), and two equivalent Si(1) atoms. In the third Fe site, Fe(3) is bonded to two equivalent U(1), one Fe(4), two equivalent Fe(1), one Co(3), one Co(4), one Co(5), two equivalent Co(1), and two equivalent Si(1) atoms to form distorted FeU2Fe3Co5Si2 cuboctahedra that share corners with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, corners with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, edges with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, edges with two equivalent Fe(1)U2Fe5Co5 cuboctahedra, edges with two equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, faces with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, and faces with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to two equivalent U(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(1), one Co(2), two equivalent Co(4), and two equivalent Si(1) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to one U(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(3), one Co(2), one Co(5), and two equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to one U(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(2), one Co(1), one Co(5), and two equivalent Si(1) atoms. In the third Co site, Co(3) is bonded in a 10-coordinate geometry to one U(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(4), two equivalent Co(5), and two equivalent Si(1) atoms. In the fourth Co site, Co(4) is bonded in a 10-coordinate geometry to one U(1), one Fe(2), one Fe(3), two equivalent Fe(1), two equivalent Fe(4), one Co(3), and two equivalent Si(1) atoms. In the fifth Co site, Co(5) is bonded in a 12-coordinate geometry to two equivalent U(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(1), one Co(2), two equivalent Co(3), and two equivalent Si(1) atoms. Si(1) is bonded to two equivalent U(1), one Fe(2), one Fe(3), one Fe(4), one Co(1), one Co(2), one Co(3), one Co(4), one Co(5), and two equivalent Si(1) atoms to form distorted SiU2Fe3Co5Si2 cuboctahedra that share corners with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, corners with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, corners with six equivalent Si(1)U2Fe3Co5Si2 cuboctahedra,  an edgeedge with one Fe(3)U2Fe3Co5Si2 cuboctahedra, edges with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, faces with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, faces with two equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, and faces with four equivalent Fe(1)U2Fe5Co5 cuboctahedra. is represented by the CIF file [CIF]
data_UFe5Co5Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.824
_cell_length_b   6.211
_cell_length_c   6.206
_cell_angle_alpha   98.351
_cell_angle_beta   112.870
_cell_angle_gamma   67.147
_symmetry_Int_Tables_number   1
_cell_volume   157.876
_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  0.001  0.999  0.001  1.0
  Fe  Fe1  1  0.498  0.003  0.498  1.0
  Fe  Fe2  1  0.996  0.003  0.498  1.0
  Fe  Fe3  1  0.722  0.777  0.221  1.0
  Fe  Fe4  1  0.279  0.219  0.778  1.0
  Fe  Fe5  1  0.501  0.774  0.776  1.0
  Co  Co6  1  0.656  0.348  0.660  1.0
  Co  Co7  1  0.344  0.654  0.343  1.0
  Co  Co8  1  0.996  0.349  0.342  1.0
  Co  Co9  1  0.004  0.649  0.658  1.0
  Co  Co10  1  0.497  0.230  0.224  1.0
  Si  Si11  1  0.502  0.497  0.002  1.0
  Si  Si12  1  0.003  0.497  0.002  1.0
[/CIF]
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The structure described by UFe5Co5Si2 crystallizes in the monoclinic Cm space group. U(1) is bonded in a 20-coordinate geometry to two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(4), four equivalent Fe(1), one Co(1), one Co(2), one Co(3), one Co(4), two equivalent Co(5), and four equivalent Si(1) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent U(1), one Fe(2), one Fe(3), one Fe(4), two equivalent Fe(1), one Co(1), one Co(2), one Co(3), one Co(4), and one Co(5) atom to form distorted FeU2Fe5Co5 cuboctahedra that share corners with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, corners with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, corners with six equivalent Fe(1)U2Fe5Co5 cuboctahedra,  an edgeedge with one Fe(3)U2Fe3Co5Si2 cuboctahedra, edges with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, faces with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, faces with two equivalent Fe(1)U2Fe5Co5 cuboctahedra, and faces with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent U(1), one Fe(4), two equivalent Fe(1), one Co(3), one Co(4), one Co(5), two equivalent Co(2), and two equivalent Si(1) atoms. In the third Fe site, Fe(3) is bonded to two equivalent U(1), one Fe(4), two equivalent Fe(1), one Co(3), one Co(4), one Co(5), two equivalent Co(1), and two equivalent Si(1) atoms to form distorted FeU2Fe3Co5Si2 cuboctahedra that share corners with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, corners with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, edges with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, edges with two equivalent Fe(1)U2Fe5Co5 cuboctahedra, edges with two equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, faces with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, and faces with four equivalent Si(1)U2Fe3Co5Si2 cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to two equivalent U(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(1), one Co(2), two equivalent Co(4), and two equivalent Si(1) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to one U(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(3), one Co(2), one Co(5), and two equivalent Si(1) atoms. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to one U(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(2), one Co(1), one Co(5), and two equivalent Si(1) atoms. In the third Co site, Co(3) is bonded in a 10-coordinate geometry to one U(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(4), two equivalent Co(5), and two equivalent Si(1) atoms. In the fourth Co site, Co(4) is bonded in a 10-coordinate geometry to one U(1), one Fe(2), one Fe(3), two equivalent Fe(1), two equivalent Fe(4), one Co(3), and two equivalent Si(1) atoms. In the fifth Co site, Co(5) is bonded in a 12-coordinate geometry to two equivalent U(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(1), one Co(2), two equivalent Co(3), and two equivalent Si(1) atoms. Si(1) is bonded to two equivalent U(1), one Fe(2), one Fe(3), one Fe(4), one Co(1), one Co(2), one Co(3), one Co(4), one Co(5), and two equivalent Si(1) atoms to form distorted SiU2Fe3Co5Si2 cuboctahedra that share corners with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, corners with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, corners with six equivalent Si(1)U2Fe3Co5Si2 cuboctahedra,  an edgeedge with one Fe(3)U2Fe3Co5Si2 cuboctahedra, edges with four equivalent Fe(1)U2Fe5Co5 cuboctahedra, faces with two equivalent Fe(3)U2Fe3Co5Si2 cuboctahedra, faces with two equivalent Si(1)U2Fe3Co5Si2 cuboctahedra, and faces with four equivalent Fe(1)U2Fe5Co5 cuboctahedra. is represented by the CIF file [CIF]
data_UFe5Co5Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.824
_cell_length_b   6.211
_cell_length_c   6.206
_cell_angle_alpha   98.351
_cell_angle_beta   112.870
_cell_angle_gamma   67.147
_symmetry_Int_Tables_number   1
_cell_volume   157.876
_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  0.001  0.999  0.001  1.0
  Fe  Fe1  1  0.498  0.003  0.498  1.0
  Fe  Fe2  1  0.996  0.003  0.498  1.0
  Fe  Fe3  1  0.722  0.777  0.221  1.0
  Fe  Fe4  1  0.279  0.219  0.778  1.0
  Fe  Fe5  1  0.501  0.774  0.776  1.0
  Co  Co6  1  0.656  0.348  0.660  1.0
  Co  Co7  1  0.344  0.654  0.343  1.0
  Co  Co8  1  0.996  0.349  0.342  1.0
  Co  Co9  1  0.004  0.649  0.658  1.0
  Co  Co10  1  0.497  0.230  0.224  1.0
  Si  Si11  1  0.502  0.497  0.002  1.0
  Si  Si12  1  0.003  0.497  0.002  1.0
[/CIF]
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