The crystal structure described by UNd2Te5 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to one Te(5), two equivalent Te(9), and four equivalent Te(2) atoms to form distorted UTe7 pentagonal bipyramids that share corners with four equivalent U(1)Te7 pentagonal bipyramids, corners with four equivalent Nd(3)Te7 pentagonal bipyramids, edges with two equivalent U(1)Te7 pentagonal bipyramids, and faces with two equivalent U(1)Te7 pentagonal bipyramids. In the second U site, U(2) is bonded in a 9-coordinate geometry to one Te(6), two equivalent Te(10), two equivalent Te(7), and four equivalent Te(3) atoms. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to one Te(1), two equivalent Te(10), two equivalent Te(7), and four equivalent Te(4) atoms. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to one Te(2), two equivalent Te(8), and four equivalent Te(5) atoms. In the third Nd site, Nd(3) is bonded to one Te(3), two equivalent Te(9), and four equivalent Te(6) atoms to form distorted NdTe7 pentagonal bipyramids that share corners with four equivalent U(1)Te7 pentagonal bipyramids, corners with four equivalent Nd(3)Te7 pentagonal bipyramids, edges with two equivalent Nd(3)Te7 pentagonal bipyramids, and faces with two equivalent Nd(3)Te7 pentagonal bipyramids. In the fourth Nd site, Nd(4) is bonded to one Te(4), two equivalent Te(8), and four equivalent Te(1) atoms to form a mixture of distorted face, corner, and edge-sharing NdTe7 pentagonal bipyramids. There are ten inequivalent Te sites. In the first Te site, Te(1) is bonded to one Nd(1) and four equivalent Nd(4) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the second Te site, Te(2) is bonded to four equivalent U(1) and one Nd(2) atom to form distorted TeNdU4 trigonal bipyramids that share corners with four equivalent Te(2)NdU4 trigonal bipyramids, edges with four equivalent Te(5)Nd4U trigonal bipyramids, and edges with four equivalent Te(2)NdU4 trigonal bipyramids. In the third Te site, Te(3) is bonded to four equivalent U(2) and one Nd(3) atom to form distorted TeNdU4 trigonal bipyramids that share corners with four equivalent Te(3)NdU4 trigonal bipyramids, edges with four equivalent Te(6)Nd4U trigonal bipyramids, and edges with four equivalent Te(3)NdU4 trigonal bipyramids. In the fourth Te site, Te(4) is bonded to one Nd(4) and four equivalent Nd(1) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the fifth Te site, Te(5) is bonded to one U(1) and four equivalent Nd(2) atoms to form distorted TeNd4U trigonal bipyramids that share corners with four equivalent Te(5)Nd4U trigonal bipyramids, edges with four equivalent Te(5)Nd4U trigonal bipyramids, and edges with four equivalent Te(2)NdU4 trigonal bipyramids. In the sixth Te site, Te(6) is bonded to one U(2) and four equivalent Nd(3) atoms to form distorted TeNd4U trigonal bipyramids that share corners with four equivalent Te(6)Nd4U trigonal bipyramids, edges with four equivalent Te(6)Nd4U trigonal bipyramids, and edges with four equivalent Te(3)NdU4 trigonal bipyramids. In the seventh Te site, Te(7) is bonded in a 8-coordinate geometry to two equivalent U(2), two equivalent Nd(1), and four equivalent Te(10) atoms. In the eighth Te site, Te(8) is bonded in a 4-coordinate geometry to two equivalent Nd(2) and two equivalent Nd(4) atoms. In the ninth Te site, Te(9) is bonded in a 4-coordinate geometry to two equivalent U(1) and two equivalent Nd(3) atoms. In the tenth Te site, Te(10) is bonded in a 8-coordinate geometry to two equivalent U(2), two equivalent Nd(1), and four equivalent Te(7) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd2UTe5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.407
_cell_length_b   4.421
_cell_length_c   26.891
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   523.950
_cell_formula_units_Z   2
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
  Nd  Nd0  1  0.500  0.500  0.090  1.0
  Nd  Nd1  1  0.500  0.500  0.421  1.0
  Nd  Nd2  1  0.500  0.500  0.753  1.0
  Nd  Nd3  1  0.000  0.000  0.247  1.0
  U  U4  1  0.000  0.000  0.578  1.0
  U  U5  1  0.000  0.000  0.910  1.0
  Te  Te6  1  0.500  0.500  0.213  1.0
  Te  Te7  1  0.500  0.500  0.547  1.0
  Te  Te8  1  0.500  0.500  0.878  1.0
  Te  Te9  1  0.000  0.000  0.124  1.0
  Te  Te10  1  0.000  0.000  0.456  1.0
  Te  Te11  1  0.000  0.000  0.789  1.0
  Te  Te12  1  0.000  0.500  0.997  1.0
  Te  Te13  1  0.000  0.500  0.334  1.0
  Te  Te14  1  0.000  0.500  0.665  1.0
  Te  Te15  1  0.500  0.000  0.997  1.0
[/CIF]
.
The crystal structure described by UNd2Te5 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to one Te(5), two equivalent Te(9), and four equivalent Te(2) atoms to form distorted UTe7 pentagonal bipyramids that share corners with four equivalent U(1)Te7 pentagonal bipyramids, corners with four equivalent Nd(3)Te7 pentagonal bipyramids, edges with two equivalent U(1)Te7 pentagonal bipyramids, and faces with two equivalent U(1)Te7 pentagonal bipyramids. In the second U site, U(2) is bonded in a 9-coordinate geometry to one Te(6), two equivalent Te(10), two equivalent Te(7), and four equivalent Te(3) atoms. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to one Te(1), two equivalent Te(10), two equivalent Te(7), and four equivalent Te(4) atoms. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to one Te(2), two equivalent Te(8), and four equivalent Te(5) atoms. In the third Nd site, Nd(3) is bonded to one Te(3), two equivalent Te(9), and four equivalent Te(6) atoms to form distorted NdTe7 pentagonal bipyramids that share corners with four equivalent U(1)Te7 pentagonal bipyramids, corners with four equivalent Nd(3)Te7 pentagonal bipyramids, edges with two equivalent Nd(3)Te7 pentagonal bipyramids, and faces with two equivalent Nd(3)Te7 pentagonal bipyramids. In the fourth Nd site, Nd(4) is bonded to one Te(4), two equivalent Te(8), and four equivalent Te(1) atoms to form a mixture of distorted face, corner, and edge-sharing NdTe7 pentagonal bipyramids. There are ten inequivalent Te sites. In the first Te site, Te(1) is bonded to one Nd(1) and four equivalent Nd(4) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the second Te site, Te(2) is bonded to four equivalent U(1) and one Nd(2) atom to form distorted TeNdU4 trigonal bipyramids that share corners with four equivalent Te(2)NdU4 trigonal bipyramids, edges with four equivalent Te(5)Nd4U trigonal bipyramids, and edges with four equivalent Te(2)NdU4 trigonal bipyramids. In the third Te site, Te(3) is bonded to four equivalent U(2) and one Nd(3) atom to form distorted TeNdU4 trigonal bipyramids that share corners with four equivalent Te(3)NdU4 trigonal bipyramids, edges with four equivalent Te(6)Nd4U trigonal bipyramids, and edges with four equivalent Te(3)NdU4 trigonal bipyramids. In the fourth Te site, Te(4) is bonded to one Nd(4) and four equivalent Nd(1) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the fifth Te site, Te(5) is bonded to one U(1) and four equivalent Nd(2) atoms to form distorted TeNd4U trigonal bipyramids that share corners with four equivalent Te(5)Nd4U trigonal bipyramids, edges with four equivalent Te(5)Nd4U trigonal bipyramids, and edges with four equivalent Te(2)NdU4 trigonal bipyramids. In the sixth Te site, Te(6) is bonded to one U(2) and four equivalent Nd(3) atoms to form distorted TeNd4U trigonal bipyramids that share corners with four equivalent Te(6)Nd4U trigonal bipyramids, edges with four equivalent Te(6)Nd4U trigonal bipyramids, and edges with four equivalent Te(3)NdU4 trigonal bipyramids. In the seventh Te site, Te(7) is bonded in a 8-coordinate geometry to two equivalent U(2), two equivalent Nd(1), and four equivalent Te(10) atoms. In the eighth Te site, Te(8) is bonded in a 4-coordinate geometry to two equivalent Nd(2) and two equivalent Nd(4) atoms. In the ninth Te site, Te(9) is bonded in a 4-coordinate geometry to two equivalent U(1) and two equivalent Nd(3) atoms. In the tenth Te site, Te(10) is bonded in a 8-coordinate geometry to two equivalent U(2), two equivalent Nd(1), and four equivalent Te(7) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd2UTe5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.407
_cell_length_b   4.421
_cell_length_c   26.891
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   523.950
_cell_formula_units_Z   2
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
  Nd  Nd0  1  0.500  0.500  0.090  1.0
  Nd  Nd1  1  0.500  0.500  0.421  1.0
  Nd  Nd2  1  0.500  0.500  0.753  1.0
  Nd  Nd3  1  0.000  0.000  0.247  1.0
  U  U4  1  0.000  0.000  0.578  1.0
  U  U5  1  0.000  0.000  0.910  1.0
  Te  Te6  1  0.500  0.500  0.213  1.0
  Te  Te7  1  0.500  0.500  0.547  1.0
  Te  Te8  1  0.500  0.500  0.878  1.0
  Te  Te9  1  0.000  0.000  0.124  1.0
  Te  Te10  1  0.000  0.000  0.456  1.0
  Te  Te11  1  0.000  0.000  0.789  1.0
  Te  Te12  1  0.000  0.500  0.997  1.0
  Te  Te13  1  0.000  0.500  0.334  1.0
  Te  Te14  1  0.000  0.500  0.665  1.0
  Te  Te15  1  0.500  0.000  0.997  1.0
[/CIF]
.