data_NbGaO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.63
_cell_length_b   6.63
_cell_length_c   6.73
_cell_angle_alpha   107.16
_cell_angle_beta   107.16
_cell_angle_gamma   33.67
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbGaO4
_chemical_formula_sum   'Nb2 Ga2 O8'
_cell_volume   156.13
_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
  Nb  Nb10  1  0.8  0.0  0.91  1.0
  Nb  Nb11  1  0.83  0.0  0.49  1.0
  Ga  Ga8  1  0.82  0.0  0.18  1.0
  Ga  Ga9  1  0.81  0.0  0.22  1.0
  O  O0  1  0.66  0.0  0.31  1.0
  O  O1  1  0.96  0.0  0.09  1.0
  O  O2  1  0.89  0.0  0.53  1.0
  O  O3  1  0.73  0.0  0.86  1.0
  O  O4  1  0.65  0.0  0.47  1.0
  O  O5  1  0.98  0.0  0.93  1.0
  O  O6  1  0.69  0.0  0.31  1.0
  O  O7  1  0.93  0.0  0.09  1.0

data_NbGaO4
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.84
_cell_length_b   6.63
_cell_length_c   6.73
_cell_angle_alpha   107.16
_cell_angle_beta   90.0
_cell_angle_gamma   106.83
_symmetry_Int_Tables_number   2
_chemical_formula_structural   NbGaO4
_chemical_formula_sum   'Nb2 Ga2 O8'
_cell_volume   156.13
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.0  0.02  0.79  1.0
  Ga  Ga1  2  0.0  0.0  0.48  1.0
  O  O2  2  0.0  0.08  0.83  1.0
  O  O3  2  0.0  0.12  0.39  1.0
  O  O4  2  0.0  0.15  0.39  1.0
  O  O5  2  0.0  0.17  0.23  1.0

Nb Nb Ga Ga O O O O O O O O
GaNbO4 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one GaNbO4 cluster. Nb(1) is bonded in a 3-coordinate geometry to one O(2), one O(3), and one O(4) atom. The Nb(1)-O(2) bond length is 0.45 Å. The Nb(1)-O(3) bond length is 1.18 Å. The Nb(1)-O(4) bond length is 1.31 Å. Ga(1) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one O(4) atom. The Ga(1)-Ga(1) bond length is 0.31 Å. The Ga(1)-O(4) bond length is 1.10 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one O(4) atom. The O(1)-O(4) bond length is 0.18 Å. In the second O site, O(2) is bonded in a single-bond geometry to one Nb(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Nb(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Nb(1), one Ga(1), and one O(1) atom.