The material described by Na2Er2B2TeO10 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms. Er(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. B(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(4) atom. Te(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Na(1), one Er(1), and one B(1) atom. In the second O site, O(2) is bonded to one Na(1), two equivalent Er(1), and one Te(1) atom to form distorted corner-sharing ONaEr2Te tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one B(1), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Er(1), and one B(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Er(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_Na2Er2B2TeO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.976
_cell_length_b   6.349
_cell_length_c   6.757
_cell_angle_alpha   76.043
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   415.306
_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
  Na  Na0  1  0.611  0.415  0.167  1.0
  Na  Na1  1  0.111  0.585  0.333  1.0
  Na  Na2  1  0.389  0.585  0.833  1.0
  Na  Na3  1  0.889  0.415  0.667  1.0
  Er  Er4  1  0.834  0.873  0.024  1.0
  Er  Er5  1  0.334  0.127  0.476  1.0
  Er  Er6  1  0.166  0.127  0.976  1.0
  Er  Er7  1  0.666  0.873  0.524  1.0
  B  B8  1  0.400  0.663  0.373  1.0
  B  B9  1  0.900  0.337  0.127  1.0
  B  B10  1  0.600  0.337  0.627  1.0
  B  B11  1  0.100  0.663  0.873  1.0
  Te  Te12  1  0.500  0.000  0.000  1.0
  Te  Te13  1  0.000  0.000  0.500  1.0
  O  O14  1  0.829  0.521  0.055  1.0
  O  O15  1  0.329  0.479  0.445  1.0
  O  O16  1  0.171  0.479  0.945  1.0
  O  O17  1  0.671  0.521  0.555  1.0
  O  O18  1  0.651  0.003  0.179  1.0
  O  O19  1  0.151  0.997  0.321  1.0
  O  O20  1  0.349  0.997  0.821  1.0
  O  O21  1  0.849  0.003  0.679  1.0
  O  O22  1  0.437  0.710  0.164  1.0
  O  O23  1  0.937  0.290  0.336  1.0
  O  O24  1  0.563  0.290  0.836  1.0
  O  O25  1  0.063  0.710  0.664  1.0
  O  O26  1  0.938  0.198  0.008  1.0
  O  O27  1  0.438  0.802  0.492  1.0
  O  O28  1  0.062  0.802  0.992  1.0
  O  O29  1  0.562  0.198  0.508  1.0
  O  O30  1  0.383  0.162  0.136  1.0
  O  O31  1  0.883  0.838  0.364  1.0
  O  O32  1  0.617  0.838  0.864  1.0
  O  O33  1  0.117  0.162  0.636  1.0
[/CIF]
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The material described by Na2Er2B2TeO10 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms. Er(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. B(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(4) atom. Te(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Na(1), one Er(1), and one B(1) atom. In the second O site, O(2) is bonded to one Na(1), two equivalent Er(1), and one Te(1) atom to form distorted corner-sharing ONaEr2Te tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one B(1), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Er(1), and one B(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Er(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_Na2Er2B2TeO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.976
_cell_length_b   6.349
_cell_length_c   6.757
_cell_angle_alpha   76.043
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   415.306
_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
  Na  Na0  1  0.611  0.415  0.167  1.0
  Na  Na1  1  0.111  0.585  0.333  1.0
  Na  Na2  1  0.389  0.585  0.833  1.0
  Na  Na3  1  0.889  0.415  0.667  1.0
  Er  Er4  1  0.834  0.873  0.024  1.0
  Er  Er5  1  0.334  0.127  0.476  1.0
  Er  Er6  1  0.166  0.127  0.976  1.0
  Er  Er7  1  0.666  0.873  0.524  1.0
  B  B8  1  0.400  0.663  0.373  1.0
  B  B9  1  0.900  0.337  0.127  1.0
  B  B10  1  0.600  0.337  0.627  1.0
  B  B11  1  0.100  0.663  0.873  1.0
  Te  Te12  1  0.500  0.000  0.000  1.0
  Te  Te13  1  0.000  0.000  0.500  1.0
  O  O14  1  0.829  0.521  0.055  1.0
  O  O15  1  0.329  0.479  0.445  1.0
  O  O16  1  0.171  0.479  0.945  1.0
  O  O17  1  0.671  0.521  0.555  1.0
  O  O18  1  0.651  0.003  0.179  1.0
  O  O19  1  0.151  0.997  0.321  1.0
  O  O20  1  0.349  0.997  0.821  1.0
  O  O21  1  0.849  0.003  0.679  1.0
  O  O22  1  0.437  0.710  0.164  1.0
  O  O23  1  0.937  0.290  0.336  1.0
  O  O24  1  0.563  0.290  0.836  1.0
  O  O25  1  0.063  0.710  0.664  1.0
  O  O26  1  0.938  0.198  0.008  1.0
  O  O27  1  0.438  0.802  0.492  1.0
  O  O28  1  0.062  0.802  0.992  1.0
  O  O29  1  0.562  0.198  0.508  1.0
  O  O30  1  0.383  0.162  0.136  1.0
  O  O31  1  0.883  0.838  0.364  1.0
  O  O32  1  0.617  0.838  0.864  1.0
  O  O33  1  0.117  0.162  0.636  1.0
[/CIF]
.