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.
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. Both Ni(1)-O(2) bond lengths are 2.06 Å. All Ni(1)-O(1) bond lengths are 2.04 Å. 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°. Both Ga(1)-O(1) bond lengths are 1.87 Å. Both Ga(1)-O(2) bond lengths are 1.89 Å. 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. Both Ga(2)-O(1) bond lengths are 1.96 Å. All Ga(2)-O(2) bond lengths are 2.01 Å. 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.