HgGa2O4 crystallizes in the orthorhombic Pnma space group. Hg(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(4), two equivalent O(1), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing GaO6 octahedra. The corner-sharing octahedral tilt angles range from 49-55°. In the second Ga site, Ga(2) is bonded to one O(1), two equivalent O(4), and three equivalent O(2) atoms to form a mixture of edge and corner-sharing GaO6 octahedra. The corner-sharing octahedral tilt angles range from 49-55°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Hg(1), one Ga(2), and two equivalent Ga(1) atoms. In the second O site, O(2) is bonded to two equivalent Hg(1) and three equivalent Ga(2) atoms to form a mixture of distorted edge and corner-sharing OGa3Hg2 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Hg(1) and three equivalent Ga(1) atoms to form a mixture of distorted edge and corner-sharing OGa3Hg2 square pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Hg(1), one Ga(1), and two equivalent Ga(2) atoms.
HgGa2O4 crystallizes in the orthorhombic Pnma space group. Hg(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There is one shorter (2.57 Å) and one longer (2.61 Å) Hg(1)-O(1) bond length. Both Hg(1)-O(2) bond lengths are 2.44 Å. Both Hg(1)-O(3) bond lengths are 2.44 Å. Both Hg(1)-O(4) bond lengths are 2.66 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(4), two equivalent O(1), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing GaO6 octahedra. The corner-sharing octahedral tilt angles range from 49-55°. The Ga(1)-O(4) bond length is 2.04 Å. Both Ga(1)-O(1) bond lengths are 2.01 Å. There is one shorter (2.04 Å) and two longer (2.06 Å) Ga(1)-O(3) bond lengths. In the second Ga site, Ga(2) is bonded to one O(1), two equivalent O(4), and three equivalent O(2) atoms to form a mixture of edge and corner-sharing GaO6 octahedra. The corner-sharing octahedral tilt angles range from 49-55°. The Ga(2)-O(1) bond length is 2.08 Å. Both Ga(2)-O(4) bond lengths are 2.03 Å. There is one shorter (2.00 Å) and two longer (2.07 Å) Ga(2)-O(2) bond lengths. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Hg(1), one Ga(2), and two equivalent Ga(1) atoms. In the second O site, O(2) is bonded to two equivalent Hg(1) and three equivalent Ga(2) atoms to form a mixture of distorted edge and corner-sharing OGa3Hg2 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Hg(1) and three equivalent Ga(1) atoms to form a mixture of distorted edge and corner-sharing OGa3Hg2 square pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Hg(1), one Ga(1), and two equivalent Ga(2) atoms.