The compound described by NaZnAs(H2O3)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent H(1), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaH2O6 hexagonal bipyramids that share corners with four equivalent Na(2)O6 octahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-56°. In the second Na site, Na(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted NaO6 octahedra that share corners with four equivalent Na(1)H2O6 hexagonal bipyramids, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent As(1)O4 tetrahedra. Zn(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form ZnO4 tetrahedra that share  a cornercorner with one Na(1)H2O6 hexagonal bipyramid,  a cornercorner with one Na(2)O6 octahedra, and corners with four equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 68°. As(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)H2O6 hexagonal bipyramid,  a cornercorner with one Na(2)O6 octahedra, and corners with four equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Na(1) and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(1), and one H(3) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(2), and one H(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Na(2), one Zn(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Zn(1), one As(1), and one H(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one As(1) atom. is represented by the CIF file [CIF]
data_NaZnAs(H2O3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.754
_cell_length_b   6.218
_cell_length_c   7.954
_cell_angle_alpha   92.126
_cell_angle_beta   91.443
_cell_angle_gamma   91.385
_symmetry_Int_Tables_number   1
_cell_volume   284.209
_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  0.500  0.500  0.000  1.0
  Na  Na1  1  0.000  0.000  0.000  1.0
  Zn  Zn2  1  0.313  0.254  0.388  1.0
  Zn  Zn3  1  0.687  0.746  0.612  1.0
  As  As4  1  0.187  0.749  0.382  1.0
  As  As5  1  0.813  0.251  0.618  1.0
  H  H6  1  0.132  0.611  0.026  1.0
  H  H7  1  0.541  0.905  0.149  1.0
  H  H8  1  0.938  0.397  0.167  1.0
  H  H9  1  0.750  0.795  0.231  1.0
  H  H10  1  0.250  0.205  0.769  1.0
  H  H11  1  0.062  0.603  0.833  1.0
  H  H12  1  0.459  0.095  0.851  1.0
  H  H13  1  0.868  0.389  0.974  1.0
  O  O14  1  0.833  0.325  0.081  1.0
  O  O15  1  0.676  0.819  0.118  1.0
  O  O16  1  0.225  0.515  0.254  1.0
  O  O17  1  0.258  0.968  0.262  1.0
  O  O18  1  0.894  0.757  0.417  1.0
  O  O19  1  0.648  0.264  0.438  1.0
  O  O20  1  0.352  0.736  0.562  1.0
  O  O21  1  0.106  0.243  0.583  1.0
  O  O22  1  0.742  0.032  0.738  1.0
  O  O23  1  0.775  0.485  0.746  1.0
  O  O24  1  0.324  0.181  0.882  1.0
  O  O25  1  0.167  0.675  0.919  1.0
[/CIF]
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The compound described by NaZnAs(H2O3)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent H(1), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaH2O6 hexagonal bipyramids that share corners with four equivalent Na(2)O6 octahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-56°. In the second Na site, Na(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted NaO6 octahedra that share corners with four equivalent Na(1)H2O6 hexagonal bipyramids, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent As(1)O4 tetrahedra. Zn(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form ZnO4 tetrahedra that share  a cornercorner with one Na(1)H2O6 hexagonal bipyramid,  a cornercorner with one Na(2)O6 octahedra, and corners with four equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 68°. As(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one Na(1)H2O6 hexagonal bipyramid,  a cornercorner with one Na(2)O6 octahedra, and corners with four equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Na(1) and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(1), and one H(3) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(2), and one H(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Na(2), one Zn(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Zn(1), one As(1), and one H(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one As(1) atom. is represented by the CIF file [CIF]
data_NaZnAs(H2O3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.754
_cell_length_b   6.218
_cell_length_c   7.954
_cell_angle_alpha   92.126
_cell_angle_beta   91.443
_cell_angle_gamma   91.385
_symmetry_Int_Tables_number   1
_cell_volume   284.209
_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  0.500  0.500  0.000  1.0
  Na  Na1  1  0.000  0.000  0.000  1.0
  Zn  Zn2  1  0.313  0.254  0.388  1.0
  Zn  Zn3  1  0.687  0.746  0.612  1.0
  As  As4  1  0.187  0.749  0.382  1.0
  As  As5  1  0.813  0.251  0.618  1.0
  H  H6  1  0.132  0.611  0.026  1.0
  H  H7  1  0.541  0.905  0.149  1.0
  H  H8  1  0.938  0.397  0.167  1.0
  H  H9  1  0.750  0.795  0.231  1.0
  H  H10  1  0.250  0.205  0.769  1.0
  H  H11  1  0.062  0.603  0.833  1.0
  H  H12  1  0.459  0.095  0.851  1.0
  H  H13  1  0.868  0.389  0.974  1.0
  O  O14  1  0.833  0.325  0.081  1.0
  O  O15  1  0.676  0.819  0.118  1.0
  O  O16  1  0.225  0.515  0.254  1.0
  O  O17  1  0.258  0.968  0.262  1.0
  O  O18  1  0.894  0.757  0.417  1.0
  O  O19  1  0.648  0.264  0.438  1.0
  O  O20  1  0.352  0.736  0.562  1.0
  O  O21  1  0.106  0.243  0.583  1.0
  O  O22  1  0.742  0.032  0.738  1.0
  O  O23  1  0.775  0.485  0.746  1.0
  O  O24  1  0.324  0.181  0.882  1.0
  O  O25  1  0.167  0.675  0.919  1.0
[/CIF]
.