The material structure described by Sm(SeO3)2O2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure consists of four hydrogen peroxide molecules inside a Sm(SeO3)2 framework. In the Sm(SeO3)2 framework, Sm(1) is bonded to one O(2), one O(5), one O(7), two equivalent O(1), and two equivalent O(4) atoms to form distorted SmO7 pentagonal bipyramids that share corners with two equivalent Se(2)O4 tetrahedra and edges with two equivalent Sm(1)O7 pentagonal bipyramids. There are two 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(4) atom. In the second Se site, Se(2) is bonded to one O(5), one O(7), and two equivalent O(3) atoms to form distorted SeO4 tetrahedra that share corners with two equivalent Sm(1)O7 pentagonal bipyramids and corners with two equivalent Se(2)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Sm(1) and one Se(2) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sm(1) and one Se(1) atom. In the third O site, O(2) is bonded in a bent 120 degrees geometry to one Sm(1) and one Se(1) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Se(2) atoms. In the fifth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(1) and one Se(1) atom. In the sixth O site, O(5) is bonded in a bent 150 degrees geometry to one Sm(1) and one Se(2) atom. is represented by the CIF card [CIF]
data_Sm(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.597
_cell_length_b   7.157
_cell_length_c   16.156
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   762.787
_cell_formula_units_Z   4
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
  Sm  Sm0  1  0.118  0.404  0.224  1.0
  Sm  Sm1  1  0.382  0.596  0.724  1.0
  Sm  Sm2  1  0.882  0.904  0.276  1.0
  Sm  Sm3  1  0.618  0.096  0.776  1.0
  Se  Se4  1  0.144  0.116  0.717  1.0
  Se  Se5  1  0.356  0.884  0.217  1.0
  Se  Se6  1  0.856  0.616  0.783  1.0
  Se  Se7  1  0.644  0.384  0.283  1.0
  Se  Se8  1  0.135  0.222  0.442  1.0
  Se  Se9  1  0.365  0.778  0.942  1.0
  Se  Se10  1  0.865  0.722  0.058  1.0
  Se  Se11  1  0.635  0.278  0.558  1.0
  O  O12  1  0.192  0.074  0.230  1.0
  O  O13  1  0.308  0.926  0.730  1.0
  O  O14  1  0.808  0.574  0.270  1.0
  O  O15  1  0.692  0.426  0.770  1.0
  O  O16  1  0.470  0.409  0.207  1.0
  O  O17  1  0.030  0.591  0.707  1.0
  O  O18  1  0.530  0.909  0.293  1.0
  O  O19  1  0.970  0.091  0.793  1.0
  O  O20  1  0.997  0.293  0.525  1.0
  O  O21  1  0.503  0.707  0.025  1.0
  O  O22  1  0.003  0.793  0.975  1.0
  O  O23  1  0.497  0.207  0.475  1.0
  O  O24  1  0.185  0.722  0.259  1.0
  O  O25  1  0.315  0.278  0.759  1.0
  O  O26  1  0.815  0.222  0.241  1.0
  O  O27  1  0.685  0.778  0.741  1.0
  O  O28  1  0.998  0.545  0.101  1.0
  O  O29  1  0.502  0.455  0.601  1.0
  O  O30  1  0.002  0.045  0.399  1.0
  O  O31  1  0.498  0.955  0.899  1.0
  O  O32  1  0.123  0.179  0.039  1.0
  O  O33  1  0.377  0.821  0.539  1.0
  O  O34  1  0.877  0.679  0.461  1.0
  O  O35  1  0.623  0.321  0.961  1.0
  O  O36  1  0.158  0.392  0.371  1.0
  O  O37  1  0.342  0.608  0.871  1.0
  O  O38  1  0.842  0.892  0.129  1.0
  O  O39  1  0.658  0.108  0.629  1.0
  O  O40  1  0.611  0.235  0.026  1.0
  O  O41  1  0.889  0.765  0.526  1.0
  O  O42  1  0.389  0.735  0.474  1.0
  O  O43  1  0.111  0.265  0.974  1.0
[/CIF]
.
The material structure described by Sm(SeO3)2O2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure consists of four hydrogen peroxide molecules inside a Sm(SeO3)2 framework. In the Sm(SeO3)2 framework, Sm(1) is bonded to one O(2), one O(5), one O(7), two equivalent O(1), and two equivalent O(4) atoms to form distorted SmO7 pentagonal bipyramids that share corners with two equivalent Se(2)O4 tetrahedra and edges with two equivalent Sm(1)O7 pentagonal bipyramids. There are two 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(4) atom. In the second Se site, Se(2) is bonded to one O(5), one O(7), and two equivalent O(3) atoms to form distorted SeO4 tetrahedra that share corners with two equivalent Sm(1)O7 pentagonal bipyramids and corners with two equivalent Se(2)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Sm(1) and one Se(2) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sm(1) and one Se(1) atom. In the third O site, O(2) is bonded in a bent 120 degrees geometry to one Sm(1) and one Se(1) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Se(2) atoms. In the fifth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(1) and one Se(1) atom. In the sixth O site, O(5) is bonded in a bent 150 degrees geometry to one Sm(1) and one Se(2) atom. is represented by the CIF card [CIF]
data_Sm(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.597
_cell_length_b   7.157
_cell_length_c   16.156
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   762.787
_cell_formula_units_Z   4
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
  Sm  Sm0  1  0.118  0.404  0.224  1.0
  Sm  Sm1  1  0.382  0.596  0.724  1.0
  Sm  Sm2  1  0.882  0.904  0.276  1.0
  Sm  Sm3  1  0.618  0.096  0.776  1.0
  Se  Se4  1  0.144  0.116  0.717  1.0
  Se  Se5  1  0.356  0.884  0.217  1.0
  Se  Se6  1  0.856  0.616  0.783  1.0
  Se  Se7  1  0.644  0.384  0.283  1.0
  Se  Se8  1  0.135  0.222  0.442  1.0
  Se  Se9  1  0.365  0.778  0.942  1.0
  Se  Se10  1  0.865  0.722  0.058  1.0
  Se  Se11  1  0.635  0.278  0.558  1.0
  O  O12  1  0.192  0.074  0.230  1.0
  O  O13  1  0.308  0.926  0.730  1.0
  O  O14  1  0.808  0.574  0.270  1.0
  O  O15  1  0.692  0.426  0.770  1.0
  O  O16  1  0.470  0.409  0.207  1.0
  O  O17  1  0.030  0.591  0.707  1.0
  O  O18  1  0.530  0.909  0.293  1.0
  O  O19  1  0.970  0.091  0.793  1.0
  O  O20  1  0.997  0.293  0.525  1.0
  O  O21  1  0.503  0.707  0.025  1.0
  O  O22  1  0.003  0.793  0.975  1.0
  O  O23  1  0.497  0.207  0.475  1.0
  O  O24  1  0.185  0.722  0.259  1.0
  O  O25  1  0.315  0.278  0.759  1.0
  O  O26  1  0.815  0.222  0.241  1.0
  O  O27  1  0.685  0.778  0.741  1.0
  O  O28  1  0.998  0.545  0.101  1.0
  O  O29  1  0.502  0.455  0.601  1.0
  O  O30  1  0.002  0.045  0.399  1.0
  O  O31  1  0.498  0.955  0.899  1.0
  O  O32  1  0.123  0.179  0.039  1.0
  O  O33  1  0.377  0.821  0.539  1.0
  O  O34  1  0.877  0.679  0.461  1.0
  O  O35  1  0.623  0.321  0.961  1.0
  O  O36  1  0.158  0.392  0.371  1.0
  O  O37  1  0.342  0.608  0.871  1.0
  O  O38  1  0.842  0.892  0.129  1.0
  O  O39  1  0.658  0.108  0.629  1.0
  O  O40  1  0.611  0.235  0.026  1.0
  O  O41  1  0.889  0.765  0.526  1.0
  O  O42  1  0.389  0.735  0.474  1.0
  O  O43  1  0.111  0.265  0.974  1.0
[/CIF]
.