The structure described by NH4H2(IO3)3 crystallizes in the triclinic P1 space group. The structure consists of two ammonium molecules inside a H2(O3I)3 framework. In the H2(O3I)3 framework, there are four inequivalent H sites. In the first H site, H(7) is bonded in a distorted single-bond geometry to one O(3) and one O(7) atom. In the second H site, H(8) is bonded in a single-bond geometry to one O(4) and one O(8) atom. In the third H site, H(11) is bonded in a linear geometry to one O(5) and one O(6) atom. In the fourth H site, H(12) is bonded in a linear geometry to one O(15) and one O(16) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one I(2) and one I(6) atom. In the second O site, O(2) is bonded in a single-bond geometry to one I(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one H(7) and one I(6) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one H(8) and one I(5) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one H(11) and one I(6) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one H(11) and one I(5) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one H(7) and one I(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one H(8) and one I(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one I(4) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one I(2) and one I(3) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one I(1) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one I(2) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one I(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one I(4) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one H(12) and one I(2) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one H(12) and one I(1) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to one I(1) and one I(3) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one I(2) and one I(4) atom. There are six inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to one O(11), one O(16), one O(17), and one O(7) atom. In the second I site, I(2) is bonded in a distorted octahedral geometry to one O(1), one O(10), one O(12), one O(15), one O(18), and one O(8) atom. In the third I site, I(3) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(13), and one O(17) atom. In the fourth I site, I(4) is bonded in a distorted trigonal non-coplanar geometry to one O(14), one O(18), and one O(9) atom. In the fifth I site, I(5) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. In the sixth I site, I(6) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(3), and one O(5) atom. is represented by the CIF file [CIF]
data_H6I3NO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.419
_cell_length_b   8.442
_cell_length_c   8.516
_cell_angle_alpha   86.437
_cell_angle_beta   65.606
_cell_angle_gamma   61.022
_symmetry_Int_Tables_number   1
_cell_volume   474.964
_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  0.054  0.788  0.101  1.0
  H  H1  1  0.947  0.211  0.898  1.0
  H  H2  1  0.101  0.707  0.271  1.0
  H  H3  1  0.899  0.294  0.728  1.0
  H  H4  1  0.877  0.893  0.314  1.0
  H  H5  1  0.124  0.107  0.685  1.0
  H  H6  1  0.229  0.136  0.020  1.0
  H  H7  1  0.772  0.865  0.977  1.0
  H  H8  1  0.928  0.685  0.235  1.0
  H  H9  1  0.071  0.314  0.766  1.0
  H  H10  1  0.488  0.475  0.020  1.0
  H  H11  1  0.989  0.533  0.520  1.0
  I  I12  1  0.947  0.313  0.312  1.0
  I  I13  1  0.067  0.694  0.691  1.0
  I  I14  1  0.409  0.803  0.303  1.0
  I  I15  1  0.591  0.192  0.694  1.0
  I  I16  1  0.526  0.256  0.235  1.0
  I  I17  1  0.472  0.739  0.779  1.0
  N  N18  1  0.989  0.768  0.229  1.0
  N  N19  1  0.011  0.231  0.770  1.0
  O  O20  1  0.218  0.767  0.858  1.0
  O  O21  1  0.775  0.234  0.141  1.0
  O  O22  1  0.409  0.972  0.843  1.0
  O  O23  1  0.584  0.031  0.156  1.0
  O  O24  1  0.531  0.632  0.957  1.0
  O  O25  1  0.456  0.369  0.051  1.0
  O  O26  1  0.130  0.271  0.070  1.0
  O  O27  1  0.873  0.730  0.926  1.0
  O  O28  1  0.666  0.369  0.638  1.0
  O  O29  1  0.332  0.625  0.366  1.0
  O  O30  1  0.786  0.554  0.311  1.0
  O  O31  1  0.217  0.451  0.686  1.0
  O  O32  1  0.346  0.898  0.521  1.0
  O  O33  1  0.652  0.101  0.474  1.0
  O  O34  1  0.912  0.665  0.591  1.0
  O  O35  1  0.089  0.346  0.410  1.0
  O  O36  1  0.186  0.970  0.276  1.0
  O  O37  1  0.816  0.023  0.720  1.0
[/CIF]
.
The structure described by NH4H2(IO3)3 crystallizes in the triclinic P1 space group. The structure consists of two ammonium molecules inside a H2(O3I)3 framework. In the H2(O3I)3 framework, there are four inequivalent H sites. In the first H site, H(7) is bonded in a distorted single-bond geometry to one O(3) and one O(7) atom. In the second H site, H(8) is bonded in a single-bond geometry to one O(4) and one O(8) atom. In the third H site, H(11) is bonded in a linear geometry to one O(5) and one O(6) atom. In the fourth H site, H(12) is bonded in a linear geometry to one O(15) and one O(16) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one I(2) and one I(6) atom. In the second O site, O(2) is bonded in a single-bond geometry to one I(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one H(7) and one I(6) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one H(8) and one I(5) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one H(11) and one I(6) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one H(11) and one I(5) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one H(7) and one I(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one H(8) and one I(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one I(4) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one I(2) and one I(3) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one I(1) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one I(2) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one I(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one I(4) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one H(12) and one I(2) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one H(12) and one I(1) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to one I(1) and one I(3) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one I(2) and one I(4) atom. There are six inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to one O(11), one O(16), one O(17), and one O(7) atom. In the second I site, I(2) is bonded in a distorted octahedral geometry to one O(1), one O(10), one O(12), one O(15), one O(18), and one O(8) atom. In the third I site, I(3) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(13), and one O(17) atom. In the fourth I site, I(4) is bonded in a distorted trigonal non-coplanar geometry to one O(14), one O(18), and one O(9) atom. In the fifth I site, I(5) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. In the sixth I site, I(6) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(3), and one O(5) atom. is represented by the CIF file [CIF]
data_H6I3NO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.419
_cell_length_b   8.442
_cell_length_c   8.516
_cell_angle_alpha   86.437
_cell_angle_beta   65.606
_cell_angle_gamma   61.022
_symmetry_Int_Tables_number   1
_cell_volume   474.964
_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  0.054  0.788  0.101  1.0
  H  H1  1  0.947  0.211  0.898  1.0
  H  H2  1  0.101  0.707  0.271  1.0
  H  H3  1  0.899  0.294  0.728  1.0
  H  H4  1  0.877  0.893  0.314  1.0
  H  H5  1  0.124  0.107  0.685  1.0
  H  H6  1  0.229  0.136  0.020  1.0
  H  H7  1  0.772  0.865  0.977  1.0
  H  H8  1  0.928  0.685  0.235  1.0
  H  H9  1  0.071  0.314  0.766  1.0
  H  H10  1  0.488  0.475  0.020  1.0
  H  H11  1  0.989  0.533  0.520  1.0
  I  I12  1  0.947  0.313  0.312  1.0
  I  I13  1  0.067  0.694  0.691  1.0
  I  I14  1  0.409  0.803  0.303  1.0
  I  I15  1  0.591  0.192  0.694  1.0
  I  I16  1  0.526  0.256  0.235  1.0
  I  I17  1  0.472  0.739  0.779  1.0
  N  N18  1  0.989  0.768  0.229  1.0
  N  N19  1  0.011  0.231  0.770  1.0
  O  O20  1  0.218  0.767  0.858  1.0
  O  O21  1  0.775  0.234  0.141  1.0
  O  O22  1  0.409  0.972  0.843  1.0
  O  O23  1  0.584  0.031  0.156  1.0
  O  O24  1  0.531  0.632  0.957  1.0
  O  O25  1  0.456  0.369  0.051  1.0
  O  O26  1  0.130  0.271  0.070  1.0
  O  O27  1  0.873  0.730  0.926  1.0
  O  O28  1  0.666  0.369  0.638  1.0
  O  O29  1  0.332  0.625  0.366  1.0
  O  O30  1  0.786  0.554  0.311  1.0
  O  O31  1  0.217  0.451  0.686  1.0
  O  O32  1  0.346  0.898  0.521  1.0
  O  O33  1  0.652  0.101  0.474  1.0
  O  O34  1  0.912  0.665  0.591  1.0
  O  O35  1  0.089  0.346  0.410  1.0
  O  O36  1  0.186  0.970  0.276  1.0
  O  O37  1  0.816  0.023  0.720  1.0
[/CIF]
.