The structure described by NH4H9Se2(NO4)2 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four ammonium molecules and four H9Se2(NO4)2 clusters. In each H9Se2(NO4)2 cluster, N(2) is bonded in a tetrahedral geometry to one H(3), one H(4), one H(5), and one H(6) atom. There are five inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one N(2) and one O(4) atom. In the second H site, H(4) is bonded in a single-bond geometry to one N(2) atom. In the third H site, H(5) is bonded in a single-bond geometry to one N(2) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one N(2) atom. In the fifth H site, H(7) is bonded in a linear geometry to two equivalent O(1) atoms. Se(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one H(7) and one Se(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Se(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one H(3) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_H13Se2N3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.129
_cell_length_b   6.129
_cell_length_c   16.237
_cell_angle_alpha   76.745
_cell_angle_beta   76.745
_cell_angle_gamma   60.030
_symmetry_Int_Tables_number   1
_cell_volume   509.449
_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
  H  H0  1  0.388  0.710  0.784  1.0
  H  H1  1  0.710  0.388  0.284  1.0
  H  H2  1  0.612  0.290  0.216  1.0
  H  H3  1  0.290  0.612  0.716  1.0
  H  H4  1  0.082  0.782  0.793  1.0
  H  H5  1  0.782  0.082  0.293  1.0
  H  H6  1  0.918  0.218  0.207  1.0
  H  H7  1  0.218  0.918  0.707  1.0
  H  H8  1  0.309  0.658  0.066  1.0
  H  H9  1  0.658  0.309  0.566  1.0
  H  H10  1  0.691  0.342  0.934  1.0
  H  H11  1  0.342  0.691  0.434  1.0
  H  H12  1  0.166  0.473  0.071  1.0
  H  H13  1  0.473  0.166  0.571  1.0
  H  H14  1  0.834  0.527  0.929  1.0
  H  H15  1  0.527  0.834  0.429  1.0
  H  H16  1  0.172  0.681  0.983  1.0
  H  H17  1  0.681  0.172  0.483  1.0
  H  H18  1  0.828  0.319  0.017  1.0
  H  H19  1  0.319  0.828  0.517  1.0
  H  H20  1  0.987  0.793  0.074  1.0
  H  H21  1  0.793  0.987  0.574  1.0
  H  H22  1  0.013  0.207  0.926  1.0
  H  H23  1  0.207  0.013  0.426  1.0
  H  H24  1  0.734  0.266  0.750  1.0
  H  H25  1  0.266  0.734  0.250  1.0
  Se  Se26  1  0.439  0.948  0.136  1.0
  Se  Se27  1  0.948  0.439  0.636  1.0
  Se  Se28  1  0.561  0.052  0.864  1.0
  Se  Se29  1  0.052  0.561  0.364  1.0
  N  N30  1  0.246  0.754  0.750  1.0
  N  N31  1  0.754  0.246  0.250  1.0
  N  N32  1  0.158  0.652  0.048  1.0
  N  N33  1  0.652  0.158  0.548  1.0
  N  N34  1  0.842  0.348  0.952  1.0
  N  N35  1  0.348  0.842  0.452  1.0
  O  O36  1  0.386  0.849  0.243  1.0
  O  O37  1  0.849  0.386  0.743  1.0
  O  O38  1  0.614  0.151  0.757  1.0
  O  O39  1  0.151  0.614  0.257  1.0
  O  O40  1  0.646  0.059  0.121  1.0
  O  O41  1  0.059  0.646  0.621  1.0
  O  O42  1  0.354  0.941  0.879  1.0
  O  O43  1  0.941  0.354  0.379  1.0
  O  O44  1  0.155  0.177  0.109  1.0
  O  O45  1  0.177  0.155  0.609  1.0
  O  O46  1  0.845  0.823  0.891  1.0
  O  O47  1  0.823  0.845  0.391  1.0
  O  O48  1  0.556  0.695  0.086  1.0
  O  O49  1  0.695  0.556  0.586  1.0
  O  O50  1  0.444  0.305  0.914  1.0
  O  O51  1  0.305  0.444  0.414  1.0
[/CIF]
.
The structure described by NH4H9Se2(NO4)2 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four ammonium molecules and four H9Se2(NO4)2 clusters. In each H9Se2(NO4)2 cluster, N(2) is bonded in a tetrahedral geometry to one H(3), one H(4), one H(5), and one H(6) atom. There are five inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one N(2) and one O(4) atom. In the second H site, H(4) is bonded in a single-bond geometry to one N(2) atom. In the third H site, H(5) is bonded in a single-bond geometry to one N(2) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one N(2) atom. In the fifth H site, H(7) is bonded in a linear geometry to two equivalent O(1) atoms. Se(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one H(7) and one Se(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Se(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one H(3) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_H13Se2N3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.129
_cell_length_b   6.129
_cell_length_c   16.237
_cell_angle_alpha   76.745
_cell_angle_beta   76.745
_cell_angle_gamma   60.030
_symmetry_Int_Tables_number   1
_cell_volume   509.449
_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
  H  H0  1  0.388  0.710  0.784  1.0
  H  H1  1  0.710  0.388  0.284  1.0
  H  H2  1  0.612  0.290  0.216  1.0
  H  H3  1  0.290  0.612  0.716  1.0
  H  H4  1  0.082  0.782  0.793  1.0
  H  H5  1  0.782  0.082  0.293  1.0
  H  H6  1  0.918  0.218  0.207  1.0
  H  H7  1  0.218  0.918  0.707  1.0
  H  H8  1  0.309  0.658  0.066  1.0
  H  H9  1  0.658  0.309  0.566  1.0
  H  H10  1  0.691  0.342  0.934  1.0
  H  H11  1  0.342  0.691  0.434  1.0
  H  H12  1  0.166  0.473  0.071  1.0
  H  H13  1  0.473  0.166  0.571  1.0
  H  H14  1  0.834  0.527  0.929  1.0
  H  H15  1  0.527  0.834  0.429  1.0
  H  H16  1  0.172  0.681  0.983  1.0
  H  H17  1  0.681  0.172  0.483  1.0
  H  H18  1  0.828  0.319  0.017  1.0
  H  H19  1  0.319  0.828  0.517  1.0
  H  H20  1  0.987  0.793  0.074  1.0
  H  H21  1  0.793  0.987  0.574  1.0
  H  H22  1  0.013  0.207  0.926  1.0
  H  H23  1  0.207  0.013  0.426  1.0
  H  H24  1  0.734  0.266  0.750  1.0
  H  H25  1  0.266  0.734  0.250  1.0
  Se  Se26  1  0.439  0.948  0.136  1.0
  Se  Se27  1  0.948  0.439  0.636  1.0
  Se  Se28  1  0.561  0.052  0.864  1.0
  Se  Se29  1  0.052  0.561  0.364  1.0
  N  N30  1  0.246  0.754  0.750  1.0
  N  N31  1  0.754  0.246  0.250  1.0
  N  N32  1  0.158  0.652  0.048  1.0
  N  N33  1  0.652  0.158  0.548  1.0
  N  N34  1  0.842  0.348  0.952  1.0
  N  N35  1  0.348  0.842  0.452  1.0
  O  O36  1  0.386  0.849  0.243  1.0
  O  O37  1  0.849  0.386  0.743  1.0
  O  O38  1  0.614  0.151  0.757  1.0
  O  O39  1  0.151  0.614  0.257  1.0
  O  O40  1  0.646  0.059  0.121  1.0
  O  O41  1  0.059  0.646  0.621  1.0
  O  O42  1  0.354  0.941  0.879  1.0
  O  O43  1  0.941  0.354  0.379  1.0
  O  O44  1  0.155  0.177  0.109  1.0
  O  O45  1  0.177  0.155  0.609  1.0
  O  O46  1  0.845  0.823  0.891  1.0
  O  O47  1  0.823  0.845  0.391  1.0
  O  O48  1  0.556  0.695  0.086  1.0
  O  O49  1  0.695  0.556  0.586  1.0
  O  O50  1  0.444  0.305  0.914  1.0
  O  O51  1  0.305  0.444  0.414  1.0
[/CIF]
.