The material described by Er2CoTe2(SO7)2 crystallizes in the triclinic P-1 space group. Er(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(6), one O(7), two equivalent O(4), and two equivalent O(5) atoms. Co(1) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra. Te(1) is bonded in a distorted T-shaped geometry to one O(5), one O(6), and one O(7) atom. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 46°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Er(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Er(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Er(1) and one Te(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Co(1), and one Te(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Co(1), and one Te(1) atom. is represented by the CIF file [CIF]
data_Er2CoTe2(SO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.273
_cell_length_b   7.873
_cell_length_c   8.154
_cell_angle_alpha   64.147
_cell_angle_beta   73.150
_cell_angle_gamma   85.551
_symmetry_Int_Tables_number   1
_cell_volume   291.103
_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  0.917  0.747  0.983  1.0
  Er  Er1  1  0.083  0.253  0.017  1.0
  Co  Co2  1  0.000  0.000  0.500  1.0
  Te  Te3  1  0.484  0.726  0.664  1.0
  Te  Te4  1  0.516  0.274  0.336  1.0
  S  S5  1  0.236  0.755  0.247  1.0
  S  S6  1  0.764  0.245  0.753  1.0
  O  O7  1  0.100  0.595  0.251  1.0
  O  O8  1  0.900  0.405  0.749  1.0
  O  O9  1  0.134  0.772  0.429  1.0
  O  O10  1  0.866  0.228  0.571  1.0
  O  O11  1  0.526  0.731  0.211  1.0
  O  O12  1  0.474  0.269  0.789  1.0
  O  O13  1  0.176  0.927  0.086  1.0
  O  O14  1  0.824  0.073  0.914  1.0
  O  O15  1  0.244  0.560  0.898  1.0
  O  O16  1  0.756  0.440  0.102  1.0
  O  O17  1  0.725  0.807  0.753  1.0
  O  O18  1  0.275  0.193  0.247  1.0
  O  O19  1  0.247  0.922  0.671  1.0
  O  O20  1  0.753  0.078  0.329  1.0
[/CIF]
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The material described by Er2CoTe2(SO7)2 crystallizes in the triclinic P-1 space group. Er(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(6), one O(7), two equivalent O(4), and two equivalent O(5) atoms. Co(1) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra. Te(1) is bonded in a distorted T-shaped geometry to one O(5), one O(6), and one O(7) atom. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 46°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Er(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Er(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Er(1) and one Te(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Co(1), and one Te(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Co(1), and one Te(1) atom. is represented by the CIF file [CIF]
data_Er2CoTe2(SO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.273
_cell_length_b   7.873
_cell_length_c   8.154
_cell_angle_alpha   64.147
_cell_angle_beta   73.150
_cell_angle_gamma   85.551
_symmetry_Int_Tables_number   1
_cell_volume   291.103
_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  0.917  0.747  0.983  1.0
  Er  Er1  1  0.083  0.253  0.017  1.0
  Co  Co2  1  0.000  0.000  0.500  1.0
  Te  Te3  1  0.484  0.726  0.664  1.0
  Te  Te4  1  0.516  0.274  0.336  1.0
  S  S5  1  0.236  0.755  0.247  1.0
  S  S6  1  0.764  0.245  0.753  1.0
  O  O7  1  0.100  0.595  0.251  1.0
  O  O8  1  0.900  0.405  0.749  1.0
  O  O9  1  0.134  0.772  0.429  1.0
  O  O10  1  0.866  0.228  0.571  1.0
  O  O11  1  0.526  0.731  0.211  1.0
  O  O12  1  0.474  0.269  0.789  1.0
  O  O13  1  0.176  0.927  0.086  1.0
  O  O14  1  0.824  0.073  0.914  1.0
  O  O15  1  0.244  0.560  0.898  1.0
  O  O16  1  0.756  0.440  0.102  1.0
  O  O17  1  0.725  0.807  0.753  1.0
  O  O18  1  0.275  0.193  0.247  1.0
  O  O19  1  0.247  0.922  0.671  1.0
  O  O20  1  0.753  0.078  0.329  1.0
[/CIF]
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