Ge(Ga)S4 crystallizes in the monoclinic Cc space group. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one S(1), one S(2), one S(3), and one S(7) atom to form GaS4 tetrahedra that share  a cornercorner with one Ga(2)S4 tetrahedra,  a cornercorner with one Ge(1)S4 tetrahedra, and corners with two equivalent Ge(2)S4 tetrahedra. In the second Ga site, Ga(2) is bonded to one S(2), one S(5), one S(6), and one S(8) atom to form GaS4 tetrahedra that share  a cornercorner with one Ga(1)S4 tetrahedra,  a cornercorner with one Ge(2)S4 tetrahedra, and corners with two equivalent Ge(1)S4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one S(3), one S(4), one S(5), and one S(6) atom to form GeS4 tetrahedra that share  a cornercorner with one Ga(1)S4 tetrahedra,  a cornercorner with one Ge(2)S4 tetrahedra, and corners with two equivalent Ga(2)S4 tetrahedra. In the second Ge site, Ge(2) is bonded to one S(1), one S(4), one S(7), and one S(8) atom to form GeS4 tetrahedra that share  a cornercorner with one Ga(2)S4 tetrahedra,  a cornercorner with one Ge(1)S4 tetrahedra, and corners with two equivalent Ga(1)S4 tetrahedra. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a water-like geometry to one Ga(1) and one Ge(2) atom. In the second S site, S(2) is bonded in a water-like geometry to one Ga(1) and one Ga(2) atom. In the third S site, S(3) is bonded in a water-like geometry to one Ga(1) and one Ge(1) atom. In the fourth S site, S(4) is bonded in a water-like geometry to one Ge(1) and one Ge(2) atom. In the fifth S site, S(5) is bonded in a water-like geometry to one Ga(2) and one Ge(1) atom. In the sixth S site, S(6) is bonded in a water-like geometry to one Ga(2) and one Ge(1) atom. In the seventh S site, S(7) is bonded in a water-like geometry to one Ga(1) and one Ge(2) atom. In the eighth S site, S(8) is bonded in a water-like geometry to one Ga(2) and one Ge(2) atom.
Ge(Ga)S4 crystallizes in the monoclinic Cc space group. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one S(1), one S(2), one S(3), and one S(7) atom to form GaS4 tetrahedra that share  a cornercorner with one Ga(2)S4 tetrahedra,  a cornercorner with one Ge(1)S4 tetrahedra, and corners with two equivalent Ge(2)S4 tetrahedra. The Ga(1)-S(1) bond length is 2.28 Å. The Ga(1)-S(2) bond length is 2.29 Å. The Ga(1)-S(3) bond length is 2.30 Å. The Ga(1)-S(7) bond length is 2.31 Å. In the second Ga site, Ga(2) is bonded to one S(2), one S(5), one S(6), and one S(8) atom to form GaS4 tetrahedra that share  a cornercorner with one Ga(1)S4 tetrahedra,  a cornercorner with one Ge(2)S4 tetrahedra, and corners with two equivalent Ge(1)S4 tetrahedra. The Ga(2)-S(2) bond length is 2.30 Å. The Ga(2)-S(5) bond length is 2.27 Å. The Ga(2)-S(6) bond length is 2.29 Å. The Ga(2)-S(8) bond length is 2.30 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one S(3), one S(4), one S(5), and one S(6) atom to form GeS4 tetrahedra that share  a cornercorner with one Ga(1)S4 tetrahedra,  a cornercorner with one Ge(2)S4 tetrahedra, and corners with two equivalent Ga(2)S4 tetrahedra. The Ge(1)-S(3) bond length is 2.24 Å. The Ge(1)-S(4) bond length is 2.24 Å. The Ge(1)-S(5) bond length is 2.21 Å. The Ge(1)-S(6) bond length is 2.25 Å. In the second Ge site, Ge(2) is bonded to one S(1), one S(4), one S(7), and one S(8) atom to form GeS4 tetrahedra that share  a cornercorner with one Ga(2)S4 tetrahedra,  a cornercorner with one Ge(1)S4 tetrahedra, and corners with two equivalent Ga(1)S4 tetrahedra. The Ge(2)-S(1) bond length is 2.21 Å. The Ge(2)-S(4) bond length is 2.26 Å. The Ge(2)-S(7) bond length is 2.23 Å. The Ge(2)-S(8) bond length is 2.25 Å. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a water-like geometry to one Ga(1) and one Ge(2) atom. In the second S site, S(2) is bonded in a water-like geometry to one Ga(1) and one Ga(2) atom. In the third S site, S(3) is bonded in a water-like geometry to one Ga(1) and one Ge(1) atom. In the fourth S site, S(4) is bonded in a water-like geometry to one Ge(1) and one Ge(2) atom. In the fifth S site, S(5) is bonded in a water-like geometry to one Ga(2) and one Ge(1) atom. In the sixth S site, S(6) is bonded in a water-like geometry to one Ga(2) and one Ge(1) atom. In the seventh S site, S(7) is bonded in a water-like geometry to one Ga(1) and one Ge(2) atom. In the eighth S site, S(8) is bonded in a water-like geometry to one Ga(2) and one Ge(2) atom.