Sb2(SO4)3 crystallizes in the trigonal R-3 space group. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. In the second Sb site, Sb(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form SbO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra and corners with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-48°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a bent 150 degrees geometry to one Sb(1) and one S(1) atom. In the second O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one S(1) atom. In the third O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one S(1) atom. In the fourth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one S(1) atom.
Sb2(SO4)3 crystallizes in the trigonal R-3 space group. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. All Sb(1)-O(2) bond lengths are 2.31 Å. All Sb(1)-O(3) bond lengths are 2.29 Å. In the second Sb site, Sb(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form SbO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. All Sb(2)-O(1) bond lengths are 2.28 Å. All Sb(2)-O(4) bond lengths are 2.31 Å. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Sb(1)O6 octahedra and corners with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-48°. The S(1)-O(1) bond length is 1.50 Å. The S(1)-O(2) bond length is 1.49 Å. The S(1)-O(3) bond length is 1.50 Å. The S(1)-O(4) bond length is 1.49 Å. There are four inequivalent O sites. In the first O site, O(2) is bonded in a bent 150 degrees geometry to one Sb(1) and one S(1) atom. In the second O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one S(1) atom. In the third O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one S(1) atom. In the fourth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one S(1) atom.