FeNiGaO4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Fe(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with six equivalent Ni(1)O6 octahedra and corners with six equivalent Ga(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-59°. Ni(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NiO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with four equivalent Ga(1)O6 octahedra. Ga(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form GaO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Ga(1)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 one Fe(1), one Ni(1), and two equivalent Ga(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Ni(1), and one Ga(1) atom.
FeNiGaO4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Fe(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with six equivalent Ni(1)O6 octahedra and corners with six equivalent Ga(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-59°. Both Fe(1)-O(1) bond lengths are 1.95 Å. Both Fe(1)-O(2) bond lengths are 1.91 Å. Ni(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NiO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with four equivalent Ga(1)O6 octahedra. Both Ni(1)-O(1) bond lengths are 2.08 Å. All Ni(1)-O(2) bond lengths are 2.08 Å. Ga(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form GaO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Ga(1)O6 octahedra, and edges with four equivalent Ni(1)O6 octahedra. Both Ga(1)-O(2) bond lengths are 2.00 Å. All Ga(1)-O(1) bond lengths are 2.03 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Ni(1), and two equivalent Ga(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Ni(1), and one Ga(1) atom.