The structure described by NiGa2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. Ni(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with four equivalent Ga(2)O6 octahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GaO4 tetrahedra that share corners with six equivalent Ni(1)O6 octahedra and corners with six equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. In the second Ga site, Ga(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form GaO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra, edges with two equivalent Ga(2)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Ni(1), one Ga(1), and one Ga(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Ni(1), one Ga(1), and two equivalent Ga(2) atoms. is represented by the CIF file [CIF]
data_Ga2NiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.790
_cell_length_b   5.848
_cell_length_c   5.848
_cell_angle_alpha   60.751
_cell_angle_beta   60.327
_cell_angle_gamma   60.327
_symmetry_Int_Tables_number   1
_cell_volume   141.506
_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
  Ga  Ga0  1  0.007  0.993  0.993  1.0
  Ga  Ga1  1  0.743  0.757  0.757  1.0
  Ga  Ga2  1  0.375  0.375  0.875  1.0
  Ga  Ga3  1  0.375  0.875  0.375  1.0
  Ni  Ni4  1  0.875  0.375  0.375  1.0
  Ni  Ni5  1  0.375  0.375  0.375  1.0
  O  O6  1  0.612  0.145  0.630  1.0
  O  O7  1  0.612  0.630  0.145  1.0
  O  O8  1  0.137  0.120  0.605  1.0
  O  O9  1  0.137  0.605  0.120  1.0
  O  O10  1  0.611  0.624  0.624  1.0
  O  O11  1  0.141  0.624  0.624  1.0
  O  O12  1  0.609  0.126  0.126  1.0
  O  O13  1  0.139  0.126  0.126  1.0
[/CIF]
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The structure described by NiGa2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. Ni(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with four equivalent Ga(2)O6 octahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GaO4 tetrahedra that share corners with six equivalent Ni(1)O6 octahedra and corners with six equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. In the second Ga site, Ga(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form GaO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra, edges with two equivalent Ga(2)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Ni(1), one Ga(1), and one Ga(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Ni(1), one Ga(1), and two equivalent Ga(2) atoms. is represented by the CIF file [CIF]
data_Ga2NiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.790
_cell_length_b   5.848
_cell_length_c   5.848
_cell_angle_alpha   60.751
_cell_angle_beta   60.327
_cell_angle_gamma   60.327
_symmetry_Int_Tables_number   1
_cell_volume   141.506
_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
  Ga  Ga0  1  0.007  0.993  0.993  1.0
  Ga  Ga1  1  0.743  0.757  0.757  1.0
  Ga  Ga2  1  0.375  0.375  0.875  1.0
  Ga  Ga3  1  0.375  0.875  0.375  1.0
  Ni  Ni4  1  0.875  0.375  0.375  1.0
  Ni  Ni5  1  0.375  0.375  0.375  1.0
  O  O6  1  0.612  0.145  0.630  1.0
  O  O7  1  0.612  0.630  0.145  1.0
  O  O8  1  0.137  0.120  0.605  1.0
  O  O9  1  0.137  0.605  0.120  1.0
  O  O10  1  0.611  0.624  0.624  1.0
  O  O11  1  0.141  0.624  0.624  1.0
  O  O12  1  0.609  0.126  0.126  1.0
  O  O13  1  0.139  0.126  0.126  1.0
[/CIF]
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