CoGa2O4 is Spinel-like structured and crystallizes in the orthorhombic Pnna space group. Co(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra, edges with two equivalent Co(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 Co(1)O6 octahedra and corners with six equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. In the second Ga site, Ga(2) is bonded to two equivalent O(2) and four equivalent O(1) 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 Co(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 Co(1), one Ga(1), and two equivalent Ga(2) atoms. In the second O site, O(2) is bonded to two equivalent Co(1), one Ga(1), and one Ga(2) atom to form a mixture of distorted edge and corner-sharing OGa2Co2 trigonal pyramids.
CoGa2O4 is Spinel-like structured and crystallizes in the orthorhombic Pnna space group. Co(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Ga(2)O6 octahedra. Both Co(1)-O(1) bond lengths are 2.18 Å. There are two shorter (1.97 Å) and two longer (1.99 Å) Co(1)-O(2) bond lengths. 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 Co(1)O6 octahedra and corners with six equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. 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(2) and four equivalent O(1) 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 Co(1)O6 octahedra. Both Ga(2)-O(2) bond lengths are 2.00 Å. All Ga(2)-O(1) bond lengths are 1.98 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 Co(1), one Ga(1), and two equivalent Ga(2) atoms. In the second O site, O(2) is bonded to two equivalent Co(1), one Ga(1), and one Ga(2) atom to form a mixture of distorted edge and corner-sharing OGa2Co2 trigonal pyramids.