The compound described by U2(GeSi)3 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Pmmm space group. U(1) is bonded to two equivalent Ge(2), four equivalent Ge(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms to form USi6Ge6 cuboctahedra that share corners with twelve equivalent U(1)Si6Ge6 cuboctahedra, edges with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, edges with four equivalent Si(2)U4Ge8 cuboctahedra, edges with eight equivalent Ge(1)U4Si6Ge2 cuboctahedra, faces with two equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with two equivalent Si(2)U4Ge8 cuboctahedra, faces with four equivalent Ge(1)U4Si6Ge2 cuboctahedra, and faces with six equivalent U(1)Si6Ge6 cuboctahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent U(1), two equivalent Ge(2), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms to form distorted GeU4Si6Ge2 cuboctahedra that share corners with twelve equivalent Ge(1)U4Si6Ge2 cuboctahedra, edges with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, edges with four equivalent Si(2)U4Ge8 cuboctahedra, edges with eight equivalent U(1)Si6Ge6 cuboctahedra, faces with two equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with two equivalent Si(2)U4Ge8 cuboctahedra, faces with four equivalent U(1)Si6Ge6 cuboctahedra, and faces with six equivalent Ge(1)U4Si6Ge2 cuboctahedra. In the second Ge site, Ge(2) is bonded to four equivalent U(1), four equivalent Ge(1), and four equivalent Si(2) atoms to form distorted GeU4Si4Ge4 cuboctahedra that share corners with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, edges with eight equivalent U(1)Si6Ge6 cuboctahedra, edges with eight equivalent Ge(1)U4Si6Ge2 cuboctahedra, faces with four equivalent U(1)Si6Ge6 cuboctahedra, faces with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with four equivalent Ge(1)U4Si6Ge2 cuboctahedra, and faces with four equivalent Si(2)U4Ge8 cuboctahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Ge(1) atoms. In the second Si site, Si(2) is bonded to four equivalent U(1), four equivalent Ge(1), and four equivalent Ge(2) atoms to form SiU4Ge8 cuboctahedra that share corners with four equivalent Si(2)U4Ge8 cuboctahedra, edges with eight equivalent U(1)Si6Ge6 cuboctahedra, edges with eight equivalent Ge(1)U4Si6Ge2 cuboctahedra, faces with four equivalent U(1)Si6Ge6 cuboctahedra, faces with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with four equivalent Ge(1)U4Si6Ge2 cuboctahedra, and faces with four equivalent Si(2)U4Ge8 cuboctahedra. In the third Si site, Si(3) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Ge(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2(SiGe)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.116
_cell_length_b   4.139
_cell_length_c   8.183
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   139.427
_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  0.246  1.0
  U  U1  1  0.000  0.000  0.754  1.0
  Si  Si2  1  0.000  0.500  0.000  1.0
  Si  Si3  1  0.500  0.000  0.500  1.0
  Si  Si4  1  0.500  0.000  0.000  1.0
  Ge  Ge5  1  0.500  0.500  0.245  1.0
  Ge  Ge6  1  0.500  0.500  0.755  1.0
  Ge  Ge7  1  0.000  0.500  0.500  1.0
[/CIF]
.
The compound described by U2(GeSi)3 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Pmmm space group. U(1) is bonded to two equivalent Ge(2), four equivalent Ge(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms to form USi6Ge6 cuboctahedra that share corners with twelve equivalent U(1)Si6Ge6 cuboctahedra, edges with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, edges with four equivalent Si(2)U4Ge8 cuboctahedra, edges with eight equivalent Ge(1)U4Si6Ge2 cuboctahedra, faces with two equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with two equivalent Si(2)U4Ge8 cuboctahedra, faces with four equivalent Ge(1)U4Si6Ge2 cuboctahedra, and faces with six equivalent U(1)Si6Ge6 cuboctahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent U(1), two equivalent Ge(2), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms to form distorted GeU4Si6Ge2 cuboctahedra that share corners with twelve equivalent Ge(1)U4Si6Ge2 cuboctahedra, edges with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, edges with four equivalent Si(2)U4Ge8 cuboctahedra, edges with eight equivalent U(1)Si6Ge6 cuboctahedra, faces with two equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with two equivalent Si(2)U4Ge8 cuboctahedra, faces with four equivalent U(1)Si6Ge6 cuboctahedra, and faces with six equivalent Ge(1)U4Si6Ge2 cuboctahedra. In the second Ge site, Ge(2) is bonded to four equivalent U(1), four equivalent Ge(1), and four equivalent Si(2) atoms to form distorted GeU4Si4Ge4 cuboctahedra that share corners with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, edges with eight equivalent U(1)Si6Ge6 cuboctahedra, edges with eight equivalent Ge(1)U4Si6Ge2 cuboctahedra, faces with four equivalent U(1)Si6Ge6 cuboctahedra, faces with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with four equivalent Ge(1)U4Si6Ge2 cuboctahedra, and faces with four equivalent Si(2)U4Ge8 cuboctahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Ge(1) atoms. In the second Si site, Si(2) is bonded to four equivalent U(1), four equivalent Ge(1), and four equivalent Ge(2) atoms to form SiU4Ge8 cuboctahedra that share corners with four equivalent Si(2)U4Ge8 cuboctahedra, edges with eight equivalent U(1)Si6Ge6 cuboctahedra, edges with eight equivalent Ge(1)U4Si6Ge2 cuboctahedra, faces with four equivalent U(1)Si6Ge6 cuboctahedra, faces with four equivalent Ge(2)U4Si4Ge4 cuboctahedra, faces with four equivalent Ge(1)U4Si6Ge2 cuboctahedra, and faces with four equivalent Si(2)U4Ge8 cuboctahedra. In the third Si site, Si(3) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Ge(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2(SiGe)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.116
_cell_length_b   4.139
_cell_length_c   8.183
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   139.427
_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  0.246  1.0
  U  U1  1  0.000  0.000  0.754  1.0
  Si  Si2  1  0.000  0.500  0.000  1.0
  Si  Si3  1  0.500  0.000  0.500  1.0
  Si  Si4  1  0.500  0.000  0.000  1.0
  Ge  Ge5  1  0.500  0.500  0.245  1.0
  Ge  Ge6  1  0.500  0.500  0.755  1.0
  Ge  Ge7  1  0.000  0.500  0.500  1.0
[/CIF]
.