The crystal structure described by UErTe4 crystallizes in the monoclinic Cm space group. U(1) is bonded in a 8-coordinate geometry to two equivalent Te(1), two equivalent Te(2), two equivalent Te(3), and two equivalent Te(4) atoms. Er(1) is bonded in a 8-coordinate geometry to two equivalent Te(1), two equivalent Te(2), two equivalent Te(3), and two equivalent Te(4) atoms. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent U(1) and two equivalent Er(1) atoms to form a mixture of distorted edge and corner-sharing TeEr2U2 trigonal pyramids. In the second Te site, Te(2) is bonded to two equivalent U(1) and two equivalent Er(1) atoms to form a mixture of edge and corner-sharing TeEr2U2 trigonal pyramids. In the third Te site, Te(3) is bonded in a 6-coordinate geometry to two equivalent U(1), two equivalent Er(1), and two equivalent Te(4) atoms. In the fourth Te site, Te(4) is bonded in a 6-coordinate geometry to two equivalent U(1), two equivalent Er(1), and two equivalent Te(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErUTe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.035
_cell_length_b   8.052
_cell_length_c   8.052
_cell_angle_alpha   149.434
_cell_angle_beta   135.342
_cell_angle_gamma   55.108
_symmetry_Int_Tables_number   1
_cell_volume   185.032
_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
  Er  Er0  1  0.860  0.859  0.001  1.0
  U  U1  1  0.136  0.137  0.999  1.0
  Te  Te2  1  0.709  0.209  0.500  1.0
  Te  Te3  1  0.295  0.794  0.501  1.0
  Te  Te4  1  0.753  0.501  0.251  1.0
  Te  Te5  1  0.247  0.500  0.748  1.0
[/CIF]
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The crystal structure described by UErTe4 crystallizes in the monoclinic Cm space group. U(1) is bonded in a 8-coordinate geometry to two equivalent Te(1), two equivalent Te(2), two equivalent Te(3), and two equivalent Te(4) atoms. Er(1) is bonded in a 8-coordinate geometry to two equivalent Te(1), two equivalent Te(2), two equivalent Te(3), and two equivalent Te(4) atoms. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent U(1) and two equivalent Er(1) atoms to form a mixture of distorted edge and corner-sharing TeEr2U2 trigonal pyramids. In the second Te site, Te(2) is bonded to two equivalent U(1) and two equivalent Er(1) atoms to form a mixture of edge and corner-sharing TeEr2U2 trigonal pyramids. In the third Te site, Te(3) is bonded in a 6-coordinate geometry to two equivalent U(1), two equivalent Er(1), and two equivalent Te(4) atoms. In the fourth Te site, Te(4) is bonded in a 6-coordinate geometry to two equivalent U(1), two equivalent Er(1), and two equivalent Te(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErUTe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.035
_cell_length_b   8.052
_cell_length_c   8.052
_cell_angle_alpha   149.434
_cell_angle_beta   135.342
_cell_angle_gamma   55.108
_symmetry_Int_Tables_number   1
_cell_volume   185.032
_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
  Er  Er0  1  0.860  0.859  0.001  1.0
  U  U1  1  0.136  0.137  0.999  1.0
  Te  Te2  1  0.709  0.209  0.500  1.0
  Te  Te3  1  0.295  0.794  0.501  1.0
  Te  Te4  1  0.753  0.501  0.251  1.0
  Te  Te5  1  0.247  0.500  0.748  1.0
[/CIF]
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