The compound described by HNbO3 crystallizes in the triclinic P1 space group. The structure consists of one water atom inside a Nb4H4O11 framework. In the Nb4H4O11 framework, there are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a distorted bent 150 degrees geometry to one H(1), one O(1), one O(2), and one O(6) atom. In the second Nb site, Nb(2) is bonded in a 5-coordinate geometry to one H(3), one O(11), one O(12), one O(6), one O(8), and one O(9) atom. In the third Nb site, Nb(3) is bonded in a 1-coordinate geometry to one H(1), one O(3), one O(4), and one O(8) atom. In the fourth Nb site, Nb(4) is bonded in a 8-coordinate geometry to one H(4), one O(10), one O(11), one O(12), one O(3), one O(4), one O(6), and one O(9) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one Nb(1), one Nb(3), and one O(2) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(12) and one O(3) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to one Nb(2) and one O(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one Nb(4) and one O(11) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Nb(1) and one O(9) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Nb(1) and one H(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Nb(3), one Nb(4), one H(2), and one O(12) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Nb(3), one Nb(4), one O(11), and one O(6) atom. In the fifth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Nb(1), one Nb(2), one Nb(4), and one O(4) atom. In the sixth O site, O(7) is bonded in a single-bond geometry to one H(3) atom. In the seventh O site, O(8) is bonded in a bent 120 degrees geometry to one Nb(2) and one Nb(3) atom. In the eighth O site, O(9) is bonded in a distorted T-shaped geometry to one Nb(2), one Nb(4), and one O(1) atom. In the ninth O site, O(10) is bonded in a 5-coordinate geometry to one Nb(4) atom. In the tenth O site, O(11) is bonded in a distorted single-bond geometry to one Nb(2), one Nb(4), one H(4), and one O(4) atom. In the eleventh O site, O(12) is bonded in a 4-coordinate geometry to one Nb(2), one Nb(4), one H(2), and one O(3) atom. is represented by the CIF card [CIF]
data_NbHO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.756
_cell_length_b   6.768
_cell_length_c   6.791
_cell_angle_alpha   109.850
_cell_angle_beta   108.825
_cell_angle_gamma   109.306
_symmetry_Int_Tables_number   1
_cell_volume   240.276
_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
  Nb  Nb0  1  0.509  0.986  0.032  1.0
  Nb  Nb1  1  0.983  0.492  0.032  1.0
  Nb  Nb2  1  0.475  0.480  0.545  1.0
  Nb  Nb3  1  0.994  0.993  0.470  1.0
  H  H4  1  0.440  0.821  0.738  1.0
  H  H5  1  0.450  0.191  0.371  1.0
  H  H6  1  0.740  0.555  0.818  1.0
  H  H7  1  0.881  0.285  0.602  1.0
  O  O8  1  0.700  0.213  0.095  1.0
  O  O9  1  0.318  0.800  0.884  1.0
  O  O10  1  0.317  0.199  0.481  1.0
  O  O11  1  0.698  0.798  0.506  1.0
  O  O12  1  0.520  0.303  0.782  1.0
  O  O13  1  0.514  0.721  0.208  1.0
  O  O14  1  0.885  0.687  0.790  1.0
  O  O15  1  0.070  0.285  0.214  1.0
  O  O16  1  0.810  0.528  0.276  1.0
  O  O17  1  0.198  0.479  0.720  1.0
  O  O18  1  0.822  0.113  0.700  1.0
  O  O19  1  0.204  0.923  0.272  1.0
[/CIF]
.
The compound described by HNbO3 crystallizes in the triclinic P1 space group. The structure consists of one water atom inside a Nb4H4O11 framework. In the Nb4H4O11 framework, there are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a distorted bent 150 degrees geometry to one H(1), one O(1), one O(2), and one O(6) atom. In the second Nb site, Nb(2) is bonded in a 5-coordinate geometry to one H(3), one O(11), one O(12), one O(6), one O(8), and one O(9) atom. In the third Nb site, Nb(3) is bonded in a 1-coordinate geometry to one H(1), one O(3), one O(4), and one O(8) atom. In the fourth Nb site, Nb(4) is bonded in a 8-coordinate geometry to one H(4), one O(10), one O(11), one O(12), one O(3), one O(4), one O(6), and one O(9) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one Nb(1), one Nb(3), and one O(2) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(12) and one O(3) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to one Nb(2) and one O(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one Nb(4) and one O(11) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Nb(1) and one O(9) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Nb(1) and one H(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Nb(3), one Nb(4), one H(2), and one O(12) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Nb(3), one Nb(4), one O(11), and one O(6) atom. In the fifth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Nb(1), one Nb(2), one Nb(4), and one O(4) atom. In the sixth O site, O(7) is bonded in a single-bond geometry to one H(3) atom. In the seventh O site, O(8) is bonded in a bent 120 degrees geometry to one Nb(2) and one Nb(3) atom. In the eighth O site, O(9) is bonded in a distorted T-shaped geometry to one Nb(2), one Nb(4), and one O(1) atom. In the ninth O site, O(10) is bonded in a 5-coordinate geometry to one Nb(4) atom. In the tenth O site, O(11) is bonded in a distorted single-bond geometry to one Nb(2), one Nb(4), one H(4), and one O(4) atom. In the eleventh O site, O(12) is bonded in a 4-coordinate geometry to one Nb(2), one Nb(4), one H(2), and one O(3) atom. is represented by the CIF card [CIF]
data_NbHO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.756
_cell_length_b   6.768
_cell_length_c   6.791
_cell_angle_alpha   109.850
_cell_angle_beta   108.825
_cell_angle_gamma   109.306
_symmetry_Int_Tables_number   1
_cell_volume   240.276
_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
  Nb  Nb0  1  0.509  0.986  0.032  1.0
  Nb  Nb1  1  0.983  0.492  0.032  1.0
  Nb  Nb2  1  0.475  0.480  0.545  1.0
  Nb  Nb3  1  0.994  0.993  0.470  1.0
  H  H4  1  0.440  0.821  0.738  1.0
  H  H5  1  0.450  0.191  0.371  1.0
  H  H6  1  0.740  0.555  0.818  1.0
  H  H7  1  0.881  0.285  0.602  1.0
  O  O8  1  0.700  0.213  0.095  1.0
  O  O9  1  0.318  0.800  0.884  1.0
  O  O10  1  0.317  0.199  0.481  1.0
  O  O11  1  0.698  0.798  0.506  1.0
  O  O12  1  0.520  0.303  0.782  1.0
  O  O13  1  0.514  0.721  0.208  1.0
  O  O14  1  0.885  0.687  0.790  1.0
  O  O15  1  0.070  0.285  0.214  1.0
  O  O16  1  0.810  0.528  0.276  1.0
  O  O17  1  0.198  0.479  0.720  1.0
  O  O18  1  0.822  0.113  0.700  1.0
  O  O19  1  0.204  0.923  0.272  1.0
[/CIF]
.