La3Ga3Al2SnO14 crystallizes in the trigonal P321 space group. La(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Ga(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. Al(1) is bonded to one O(1) and three equivalent O(2) atoms to form AlO4 tetrahedra that share corners with three equivalent Ga(1)O4 tetrahedra. Sn(1) is bonded to six equivalent O(3) atoms to form SnO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent La(1) and one Al(1) atom to form distorted corner-sharing OLa3Al tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent La(1), one Ga(1), and one Al(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one La(1), one Ga(1), and one Sn(1) atom.
La3Ga3Al2SnO14 crystallizes in the trigonal P321 space group. La(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Both La(1)-O(1) bond lengths are 2.67 Å. Both La(1)-O(3) bond lengths are 2.44 Å. There are two shorter (2.45 Å) and two longer (2.96 Å) La(1)-O(2) bond lengths. Ga(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. Both Ga(1)-O(2) bond lengths are 1.89 Å. Both Ga(1)-O(3) bond lengths are 1.86 Å. Al(1) is bonded to one O(1) and three equivalent O(2) atoms to form AlO4 tetrahedra that share corners with three equivalent Ga(1)O4 tetrahedra. The Al(1)-O(1) bond length is 1.75 Å. All Al(1)-O(2) bond lengths are 1.78 Å. Sn(1) is bonded to six equivalent O(3) atoms to form SnO6 octahedra that share corners with six equivalent Ga(1)O4 tetrahedra. All Sn(1)-O(3) bond lengths are 2.09 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent La(1) and one Al(1) atom to form distorted corner-sharing OLa3Al tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent La(1), one Ga(1), and one Al(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one La(1), one Ga(1), and one Sn(1) atom.