The structure described by Na5(AsO8)2O2 crystallizes in the monoclinic P2/c space group. The structure consists of two hydrogen peroxide molecules inside a Na5(AsO8)2 framework. In the Na5(AsO8)2 framework, there are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a square co-planar geometry to two equivalent O(3) and two equivalent O(8) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(6), one O(8), and two equivalent O(5) atoms. In the third Na site, Na(3) is bonded in a 3-coordinate geometry to one O(2), one O(5), one O(7), and two equivalent O(10) atoms. As(1) is bonded to one O(10), one O(4), one O(8), and one O(9) atom to form corner-sharing AsO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a distorted linear geometry to two equivalent Na(2) and two equivalent O(3) atoms. In the second O site, O(7) is bonded in a bent 120 degrees geometry to one Na(3) and one O(3) atom. In the third O site, O(8) is bonded in a distorted T-shaped geometry to one Na(1), one Na(2), and one As(1) atom. In the fourth O site, O(9) is bonded in a single-bond geometry to one As(1) atom. In the fifth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Na(3) and one As(1) atom. In the sixth O site, O(2) is bonded in a water-like geometry to one Na(3) and one O(2) atom. In the seventh O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one O(6), and one O(7) atom. In the eighth O site, O(4) is bonded in a distorted trigonal pyramidal geometry to two equivalent Na(2) and two equivalent As(1) atoms. In the ninth O site, O(5) is bonded in a 4-coordinate geometry to one Na(3), two equivalent Na(2), and one O(5) atom. is represented by the CIF file [CIF]
data_Na5(AsO9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.645
_cell_length_b   8.035
_cell_length_c   15.851
_cell_angle_alpha   71.912
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   925.598
_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  0.000  0.500  0.000  1.0
  Na  Na1  1  0.000  0.500  0.500  1.0
  Na  Na2  1  0.018  0.772  0.265  1.0
  Na  Na3  1  0.982  0.228  0.735  1.0
  Na  Na4  1  0.018  0.228  0.235  1.0
  Na  Na5  1  0.982  0.772  0.765  1.0
  Na  Na6  1  0.620  0.874  0.070  1.0
  Na  Na7  1  0.380  0.126  0.930  1.0
  Na  Na8  1  0.620  0.126  0.430  1.0
  Na  Na9  1  0.380  0.874  0.570  1.0
  As  As10  1  0.331  0.135  0.145  1.0
  As  As11  1  0.669  0.865  0.855  1.0
  As  As12  1  0.331  0.865  0.355  1.0
  As  As13  1  0.669  0.135  0.645  1.0
  O  O14  1  0.554  0.520  0.024  1.0
  O  O15  1  0.446  0.480  0.976  1.0
  O  O16  1  0.554  0.480  0.476  1.0
  O  O17  1  0.446  0.520  0.524  1.0
  O  O18  1  1.000  0.930  0.030  1.0
  O  O19  1  0.000  0.070  0.970  1.0
  O  O20  1  1.000  0.070  0.470  1.0
  O  O21  1  0.000  0.930  0.530  1.0
  O  O22  1  0.898  0.571  0.141  1.0
  O  O23  1  0.102  0.429  0.859  1.0
  O  O24  1  0.898  0.429  0.359  1.0
  O  O25  1  0.102  0.571  0.641  1.0
  O  O26  1  0.223  0.000  0.250  1.0
  O  O27  1  0.777  0.000  0.750  1.0
  O  O28  1  0.778  0.992  0.291  1.0
  O  O29  1  0.222  0.008  0.709  1.0
  O  O30  1  0.778  0.008  0.209  1.0
  O  O31  1  0.222  0.992  0.791  1.0
  O  O32  1  0.014  0.500  0.250  1.0
  O  O33  1  0.986  0.500  0.750  1.0
  O  O34  1  0.741  0.605  0.155  1.0
  O  O35  1  0.259  0.395  0.845  1.0
  O  O36  1  0.741  0.395  0.345  1.0
  O  O37  1  0.259  0.605  0.655  1.0
  O  O38  1  0.159  0.275  0.104  1.0
  O  O39  1  0.841  0.725  0.896  1.0
  O  O40  1  0.159  0.725  0.396  1.0
  O  O41  1  0.841  0.275  0.604  1.0
  O  O42  1  0.514  0.222  0.173  1.0
  O  O43  1  0.486  0.778  0.827  1.0
  O  O44  1  0.514  0.778  0.327  1.0
  O  O45  1  0.486  0.222  0.673  1.0
  O  O46  1  0.367  0.001  0.081  1.0
  O  O47  1  0.633  0.999  0.919  1.0
  O  O48  1  0.367  0.999  0.419  1.0
  O  O49  1  0.633  0.001  0.581  1.0
[/CIF]
.
The structure described by Na5(AsO8)2O2 crystallizes in the monoclinic P2/c space group. The structure consists of two hydrogen peroxide molecules inside a Na5(AsO8)2 framework. In the Na5(AsO8)2 framework, there are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a square co-planar geometry to two equivalent O(3) and two equivalent O(8) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(6), one O(8), and two equivalent O(5) atoms. In the third Na site, Na(3) is bonded in a 3-coordinate geometry to one O(2), one O(5), one O(7), and two equivalent O(10) atoms. As(1) is bonded to one O(10), one O(4), one O(8), and one O(9) atom to form corner-sharing AsO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a distorted linear geometry to two equivalent Na(2) and two equivalent O(3) atoms. In the second O site, O(7) is bonded in a bent 120 degrees geometry to one Na(3) and one O(3) atom. In the third O site, O(8) is bonded in a distorted T-shaped geometry to one Na(1), one Na(2), and one As(1) atom. In the fourth O site, O(9) is bonded in a single-bond geometry to one As(1) atom. In the fifth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Na(3) and one As(1) atom. In the sixth O site, O(2) is bonded in a water-like geometry to one Na(3) and one O(2) atom. In the seventh O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one O(6), and one O(7) atom. In the eighth O site, O(4) is bonded in a distorted trigonal pyramidal geometry to two equivalent Na(2) and two equivalent As(1) atoms. In the ninth O site, O(5) is bonded in a 4-coordinate geometry to one Na(3), two equivalent Na(2), and one O(5) atom. is represented by the CIF file [CIF]
data_Na5(AsO9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.645
_cell_length_b   8.035
_cell_length_c   15.851
_cell_angle_alpha   71.912
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   925.598
_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  0.000  0.500  0.000  1.0
  Na  Na1  1  0.000  0.500  0.500  1.0
  Na  Na2  1  0.018  0.772  0.265  1.0
  Na  Na3  1  0.982  0.228  0.735  1.0
  Na  Na4  1  0.018  0.228  0.235  1.0
  Na  Na5  1  0.982  0.772  0.765  1.0
  Na  Na6  1  0.620  0.874  0.070  1.0
  Na  Na7  1  0.380  0.126  0.930  1.0
  Na  Na8  1  0.620  0.126  0.430  1.0
  Na  Na9  1  0.380  0.874  0.570  1.0
  As  As10  1  0.331  0.135  0.145  1.0
  As  As11  1  0.669  0.865  0.855  1.0
  As  As12  1  0.331  0.865  0.355  1.0
  As  As13  1  0.669  0.135  0.645  1.0
  O  O14  1  0.554  0.520  0.024  1.0
  O  O15  1  0.446  0.480  0.976  1.0
  O  O16  1  0.554  0.480  0.476  1.0
  O  O17  1  0.446  0.520  0.524  1.0
  O  O18  1  1.000  0.930  0.030  1.0
  O  O19  1  0.000  0.070  0.970  1.0
  O  O20  1  1.000  0.070  0.470  1.0
  O  O21  1  0.000  0.930  0.530  1.0
  O  O22  1  0.898  0.571  0.141  1.0
  O  O23  1  0.102  0.429  0.859  1.0
  O  O24  1  0.898  0.429  0.359  1.0
  O  O25  1  0.102  0.571  0.641  1.0
  O  O26  1  0.223  0.000  0.250  1.0
  O  O27  1  0.777  0.000  0.750  1.0
  O  O28  1  0.778  0.992  0.291  1.0
  O  O29  1  0.222  0.008  0.709  1.0
  O  O30  1  0.778  0.008  0.209  1.0
  O  O31  1  0.222  0.992  0.791  1.0
  O  O32  1  0.014  0.500  0.250  1.0
  O  O33  1  0.986  0.500  0.750  1.0
  O  O34  1  0.741  0.605  0.155  1.0
  O  O35  1  0.259  0.395  0.845  1.0
  O  O36  1  0.741  0.395  0.345  1.0
  O  O37  1  0.259  0.605  0.655  1.0
  O  O38  1  0.159  0.275  0.104  1.0
  O  O39  1  0.841  0.725  0.896  1.0
  O  O40  1  0.159  0.725  0.396  1.0
  O  O41  1  0.841  0.275  0.604  1.0
  O  O42  1  0.514  0.222  0.173  1.0
  O  O43  1  0.486  0.778  0.827  1.0
  O  O44  1  0.514  0.778  0.327  1.0
  O  O45  1  0.486  0.222  0.673  1.0
  O  O46  1  0.367  0.001  0.081  1.0
  O  O47  1  0.633  0.999  0.919  1.0
  O  O48  1  0.367  0.999  0.419  1.0
  O  O49  1  0.633  0.001  0.581  1.0
[/CIF]
.