AgGaGe2Se6 crystallizes in the monoclinic Cc space group. Ag(1) is bonded in a distorted rectangular see-saw-like geometry to one Se(1), one Se(2), one Se(3), and one Se(5) atom. Ga(1) is bonded to one Se(1), one Se(2), one Se(5), and one Se(6) atom to form GaSe4 tetrahedra that share corners with two equivalent Ge(1)Se4 tetrahedra and corners with two equivalent Ge(2)Se4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Se(1), one Se(3), one Se(4), and one Se(5) atom to form GeSe4 tetrahedra that share corners with two equivalent Ga(1)Se4 tetrahedra and corners with two equivalent Ge(2)Se4 tetrahedra. In the second Ge site, Ge(2) is bonded to one Se(2), one Se(3), one Se(4), and one Se(6) atom to form GeSe4 tetrahedra that share corners with two equivalent Ga(1)Se4 tetrahedra and corners with two equivalent Ge(1)Se4 tetrahedra. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Ga(1), and one Ge(1) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Ga(1), and one Ge(2) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Ge(1), and one Ge(2) atom. In the fourth Se site, Se(4) is bonded in a water-like geometry to one Ge(1) and one Ge(2) atom. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to one Ag(1), one Ga(1), and one Ge(1) atom. In the sixth Se site, Se(6) is bonded in a water-like geometry to one Ga(1) and one Ge(2) atom.
AgGaGe2Se6 crystallizes in the monoclinic Cc space group. Ag(1) is bonded in a distorted rectangular see-saw-like geometry to one Se(1), one Se(2), one Se(3), and one Se(5) atom. The Ag(1)-Se(1) bond length is 2.69 Å. The Ag(1)-Se(2) bond length is 2.67 Å. The Ag(1)-Se(3) bond length is 2.83 Å. The Ag(1)-Se(5) bond length is 2.97 Å. Ga(1) is bonded to one Se(1), one Se(2), one Se(5), and one Se(6) atom to form GaSe4 tetrahedra that share corners with two equivalent Ge(1)Se4 tetrahedra and corners with two equivalent Ge(2)Se4 tetrahedra. The Ga(1)-Se(1) bond length is 2.46 Å. The Ga(1)-Se(2) bond length is 2.45 Å. The Ga(1)-Se(5) bond length is 2.45 Å. The Ga(1)-Se(6) bond length is 2.43 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Se(1), one Se(3), one Se(4), and one Se(5) atom to form GeSe4 tetrahedra that share corners with two equivalent Ga(1)Se4 tetrahedra and corners with two equivalent Ge(2)Se4 tetrahedra. The Ge(1)-Se(1) bond length is 2.40 Å. The Ge(1)-Se(3) bond length is 2.44 Å. The Ge(1)-Se(4) bond length is 2.39 Å. The Ge(1)-Se(5) bond length is 2.41 Å. In the second Ge site, Ge(2) is bonded to one Se(2), one Se(3), one Se(4), and one Se(6) atom to form GeSe4 tetrahedra that share corners with two equivalent Ga(1)Se4 tetrahedra and corners with two equivalent Ge(1)Se4 tetrahedra. The Ge(2)-Se(2) bond length is 2.39 Å. The Ge(2)-Se(3) bond length is 2.45 Å. The Ge(2)-Se(4) bond length is 2.41 Å. The Ge(2)-Se(6) bond length is 2.37 Å. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Ga(1), and one Ge(1) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Ga(1), and one Ge(2) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Ge(1), and one Ge(2) atom. In the fourth Se site, Se(4) is bonded in a water-like geometry to one Ge(1) and one Ge(2) atom. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to one Ag(1), one Ga(1), and one Ge(1) atom. In the sixth Se site, Se(6) is bonded in a water-like geometry to one Ga(1) and one Ge(2) atom.