The material structure described by Er2(SeO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(2), one O(5), one O(6), one O(7), one O(8), one O(9), and two equivalent O(3) atoms. In the second Er site, Er(2) is bonded in a pentagonal bipyramidal geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(9) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(6), one O(7), and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Er(2) and one Se(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Se(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Er(2) and one Se(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Er(1), one Er(2), and one Se(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Er(1) and one Se(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Se(2) atom. is represented by the CIF card [CIF]
data_Er2(SeO3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.942
_cell_length_b   7.969
_cell_length_c   8.876
_cell_angle_alpha   71.686
_cell_angle_beta   70.356
_cell_angle_gamma   66.232
_symmetry_Int_Tables_number   1
_cell_volume   413.999
_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
  Er  Er0  1  0.333  0.727  0.590  1.0
  Er  Er1  1  0.667  0.273  0.410  1.0
  Er  Er2  1  0.742  0.736  0.796  1.0
  Er  Er3  1  0.258  0.264  0.204  1.0
  Se  Se4  1  0.427  0.777  0.196  1.0
  Se  Se5  1  0.573  0.223  0.804  1.0
  Se  Se6  1  0.146  0.751  0.966  1.0
  Se  Se7  1  0.854  0.249  0.034  1.0
  Se  Se8  1  0.884  0.760  0.410  1.0
  Se  Se9  1  0.116  0.240  0.590  1.0
  O  O10  1  0.652  0.795  0.050  1.0
  O  O11  1  0.348  0.205  0.950  1.0
  O  O12  1  0.360  0.944  0.306  1.0
  O  O13  1  0.640  0.056  0.694  1.0
  O  O14  1  0.518  0.594  0.350  1.0
  O  O15  1  0.482  0.406  0.650  1.0
  O  O16  1  0.169  0.564  0.121  1.0
  O  O17  1  0.831  0.436  0.879  1.0
  O  O18  1  0.409  0.711  0.851  1.0
  O  O19  1  0.591  0.289  0.149  1.0
  O  O20  1  0.347  0.249  0.439  1.0
  O  O21  1  0.653  0.751  0.561  1.0
  O  O22  1  0.965  0.296  0.450  1.0
  O  O23  1  0.035  0.704  0.550  1.0
  O  O24  1  0.157  0.011  0.657  1.0
  O  O25  1  0.843  0.989  0.343  1.0
  O  O26  1  0.933  0.309  0.168  1.0
  O  O27  1  0.067  0.691  0.832  1.0
[/CIF]
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The material structure described by Er2(SeO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 8-coordinate geometry to one O(2), one O(5), one O(6), one O(7), one O(8), one O(9), and two equivalent O(3) atoms. In the second Er site, Er(2) is bonded in a pentagonal bipyramidal geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(9) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(6), one O(7), and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Er(2) and one Se(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Se(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Er(2) and one Se(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Er(1), one Er(2), and one Se(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Er(1) and one Se(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Er(1), one Er(2), and one Se(2) atom. is represented by the CIF card [CIF]
data_Er2(SeO3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.942
_cell_length_b   7.969
_cell_length_c   8.876
_cell_angle_alpha   71.686
_cell_angle_beta   70.356
_cell_angle_gamma   66.232
_symmetry_Int_Tables_number   1
_cell_volume   413.999
_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
  Er  Er0  1  0.333  0.727  0.590  1.0
  Er  Er1  1  0.667  0.273  0.410  1.0
  Er  Er2  1  0.742  0.736  0.796  1.0
  Er  Er3  1  0.258  0.264  0.204  1.0
  Se  Se4  1  0.427  0.777  0.196  1.0
  Se  Se5  1  0.573  0.223  0.804  1.0
  Se  Se6  1  0.146  0.751  0.966  1.0
  Se  Se7  1  0.854  0.249  0.034  1.0
  Se  Se8  1  0.884  0.760  0.410  1.0
  Se  Se9  1  0.116  0.240  0.590  1.0
  O  O10  1  0.652  0.795  0.050  1.0
  O  O11  1  0.348  0.205  0.950  1.0
  O  O12  1  0.360  0.944  0.306  1.0
  O  O13  1  0.640  0.056  0.694  1.0
  O  O14  1  0.518  0.594  0.350  1.0
  O  O15  1  0.482  0.406  0.650  1.0
  O  O16  1  0.169  0.564  0.121  1.0
  O  O17  1  0.831  0.436  0.879  1.0
  O  O18  1  0.409  0.711  0.851  1.0
  O  O19  1  0.591  0.289  0.149  1.0
  O  O20  1  0.347  0.249  0.439  1.0
  O  O21  1  0.653  0.751  0.561  1.0
  O  O22  1  0.965  0.296  0.450  1.0
  O  O23  1  0.035  0.704  0.550  1.0
  O  O24  1  0.157  0.011  0.657  1.0
  O  O25  1  0.843  0.989  0.343  1.0
  O  O26  1  0.933  0.309  0.168  1.0
  O  O27  1  0.067  0.691  0.832  1.0
[/CIF]
.