The material described by Er7(AgTe)2 crystallizes in the orthorhombic Imm2 space group. There are four inequivalent Er sites. In the first Er site, Er(1) is bonded in a distorted square co-planar geometry to three equivalent Ag(1) and two equivalent Te(2) atoms. In the second Er site, Er(2) is bonded in a 3-coordinate geometry to two equivalent Ag(1), one Te(2), and two equivalent Te(1) atoms. In the third Er site, Er(3) is bonded to two equivalent Ag(1), one Te(2), and two equivalent Te(1) atoms to form a mixture of distorted face, corner, and edge-sharing ErAg2Te3 trigonal bipyramids. In the fourth Er site, Er(4) is bonded in a 4-coordinate geometry to three equivalent Ag(1) and one Te(1) atom. Ag(1) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(3), three equivalent Er(1), and three equivalent Er(4) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 8-coordinate geometry to two equivalent Er(2), two equivalent Er(4), and four equivalent Er(3) atoms. In the second Te site, Te(2) is bonded in a 7-coordinate geometry to one Er(2), two equivalent Er(3), and four equivalent Er(1) atoms. is represented by the CIF file [CIF]
data_Er7(AgTe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.282
_cell_length_b   9.282
_cell_length_c   9.282
_cell_angle_alpha   154.742
_cell_angle_beta   117.599
_cell_angle_gamma   68.428
_symmetry_Int_Tables_number   1
_cell_volume   299.626
_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  0.121  0.860  0.261  1.0
  Er  Er1  1  0.400  0.140  0.261  1.0
  Er  Er2  1  0.505  0.500  0.005  1.0
  Er  Er3  1  0.041  0.626  0.415  1.0
  Er  Er4  1  0.789  0.374  0.415  1.0
  Er  Er5  1  0.440  0.816  0.624  1.0
  Er  Er6  1  0.808  0.184  0.624  1.0
  Ag  Ag7  1  0.665  0.736  0.929  1.0
  Ag  Ag8  1  0.193  0.264  0.929  1.0
  Te  Te9  1  0.765  0.000  0.765  1.0
  Te  Te10  1  0.164  0.500  0.664  1.0
[/CIF]
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The material described by Er7(AgTe)2 crystallizes in the orthorhombic Imm2 space group. There are four inequivalent Er sites. In the first Er site, Er(1) is bonded in a distorted square co-planar geometry to three equivalent Ag(1) and two equivalent Te(2) atoms. In the second Er site, Er(2) is bonded in a 3-coordinate geometry to two equivalent Ag(1), one Te(2), and two equivalent Te(1) atoms. In the third Er site, Er(3) is bonded to two equivalent Ag(1), one Te(2), and two equivalent Te(1) atoms to form a mixture of distorted face, corner, and edge-sharing ErAg2Te3 trigonal bipyramids. In the fourth Er site, Er(4) is bonded in a 4-coordinate geometry to three equivalent Ag(1) and one Te(1) atom. Ag(1) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(3), three equivalent Er(1), and three equivalent Er(4) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 8-coordinate geometry to two equivalent Er(2), two equivalent Er(4), and four equivalent Er(3) atoms. In the second Te site, Te(2) is bonded in a 7-coordinate geometry to one Er(2), two equivalent Er(3), and four equivalent Er(1) atoms. is represented by the CIF file [CIF]
data_Er7(AgTe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.282
_cell_length_b   9.282
_cell_length_c   9.282
_cell_angle_alpha   154.742
_cell_angle_beta   117.599
_cell_angle_gamma   68.428
_symmetry_Int_Tables_number   1
_cell_volume   299.626
_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  0.121  0.860  0.261  1.0
  Er  Er1  1  0.400  0.140  0.261  1.0
  Er  Er2  1  0.505  0.500  0.005  1.0
  Er  Er3  1  0.041  0.626  0.415  1.0
  Er  Er4  1  0.789  0.374  0.415  1.0
  Er  Er5  1  0.440  0.816  0.624  1.0
  Er  Er6  1  0.808  0.184  0.624  1.0
  Ag  Ag7  1  0.665  0.736  0.929  1.0
  Ag  Ag8  1  0.193  0.264  0.929  1.0
  Te  Te9  1  0.765  0.000  0.765  1.0
  Te  Te10  1  0.164  0.500  0.664  1.0
[/CIF]
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