Rb2Ga2Ge3O10 crystallizes in the monoclinic C2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(8), one O(9), and three equivalent O(6) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(7), one O(9), and three equivalent O(5) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ge(4)O4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(10), one O(6), one O(7), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and corners with two equivalent Ge(1)O4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(5), one O(7), one O(8), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and corners with two equivalent Ga(2)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form GeO4 tetrahedra that share corners with two equivalent Ga(1)O4 tetrahedra and corners with two equivalent Ge(4)O4 tetrahedra. In the third Ge site, Ge(3) is bonded to two equivalent O(10) and two equivalent O(9) atoms to form GeO4 tetrahedra that share corners with two equivalent Ga(2)O4 tetrahedra and corners with two equivalent Ge(1)O4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(2)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ga(1)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ge(2), and one Ge(4) atom. In the second O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ga(1), and one Ge(2) atom. In the third O site, O(5) is bonded in a distorted bent 120 degrees geometry to three equivalent Rb(2), one Ga(1), and one Ge(1) atom. In the fourth O site, O(6) is bonded in a 2-coordinate geometry to three equivalent Rb(1), one Ga(2), and one Ge(4) atom. In the fifth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Rb(2), one Ga(2), and one Ge(1) atom. In the sixth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Ga(2), and one Ge(1) atom. In the seventh O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ge(1), and one Ge(3) atom. In the eighth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ga(2), and one Ge(3) atom. In the ninth O site, O(1) is bonded in a bent 120 degrees geometry to one Rb(2), one Ga(1), and one Ge(4) atom. In the tenth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Ga(1), and one Ge(4) atom.
Rb2Ga2Ge3O10 crystallizes in the monoclinic C2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(8), one O(9), and three equivalent O(6) atoms. The Rb(1)-O(10) bond length is 3.00 Å. The Rb(1)-O(2) bond length is 3.13 Å. The Rb(1)-O(3) bond length is 3.06 Å. The Rb(1)-O(4) bond length is 3.12 Å. The Rb(1)-O(8) bond length is 3.12 Å. The Rb(1)-O(9) bond length is 3.34 Å. There are a spread of Rb(1)-O(6) bond distances ranging from 2.93-3.48 Å. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(7), one O(9), and three equivalent O(5) atoms. The Rb(2)-O(1) bond length is 3.25 Å. The Rb(2)-O(10) bond length is 3.21 Å. The Rb(2)-O(3) bond length is 3.12 Å. The Rb(2)-O(4) bond length is 3.03 Å. The Rb(2)-O(7) bond length is 3.14 Å. The Rb(2)-O(9) bond length is 3.05 Å. There are a spread of Rb(2)-O(5) bond distances ranging from 2.95-3.43 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ge(4)O4 tetrahedra. The Ga(1)-O(1) bond length is 1.85 Å. The Ga(1)-O(2) bond length is 1.85 Å. The Ga(1)-O(4) bond length is 1.87 Å. The Ga(1)-O(5) bond length is 1.86 Å. In the second Ga site, Ga(2) is bonded to one O(10), one O(6), one O(7), and one O(8) atom to form GaO4 tetrahedra that share  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The Ga(2)-O(10) bond length is 1.86 Å. The Ga(2)-O(6) bond length is 1.87 Å. The Ga(2)-O(7) bond length is 1.86 Å. The Ga(2)-O(8) bond length is 1.85 Å. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(5), one O(7), one O(8), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and corners with two equivalent Ga(2)O4 tetrahedra. The Ge(1)-O(5) bond length is 1.77 Å. The Ge(1)-O(7) bond length is 1.76 Å. The Ge(1)-O(8) bond length is 1.76 Å. The Ge(1)-O(9) bond length is 1.81 Å. In the second Ge site, Ge(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form GeO4 tetrahedra that share corners with two equivalent Ga(1)O4 tetrahedra and corners with two equivalent Ge(4)O4 tetrahedra. Both Ge(2)-O(3) bond lengths are 1.80 Å. Both Ge(2)-O(4) bond lengths are 1.76 Å. In the third Ge site, Ge(3) is bonded to two equivalent O(10) and two equivalent O(9) atoms to form GeO4 tetrahedra that share corners with two equivalent Ga(2)O4 tetrahedra and corners with two equivalent Ge(1)O4 tetrahedra. Both Ge(3)-O(10) bond lengths are 1.76 Å. Both Ge(3)-O(9) bond lengths are 1.80 Å. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Ga(2)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, and corners with two equivalent Ga(1)O4 tetrahedra. The Ge(4)-O(1) bond length is 1.77 Å. The Ge(4)-O(2) bond length is 1.75 Å. The Ge(4)-O(3) bond length is 1.81 Å. The Ge(4)-O(6) bond length is 1.77 Å. There are ten inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ge(2), and one Ge(4) atom. In the second O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ga(1), and one Ge(2) atom. In the third O site, O(5) is bonded in a distorted bent 120 degrees geometry to three equivalent Rb(2), one Ga(1), and one Ge(1) atom. In the fourth O site, O(6) is bonded in a 2-coordinate geometry to three equivalent Rb(1), one Ga(2), and one Ge(4) atom. In the fifth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Rb(2), one Ga(2), and one Ge(1) atom. In the sixth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Ga(2), and one Ge(1) atom. In the seventh O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ge(1), and one Ge(3) atom. In the eighth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ga(2), and one Ge(3) atom. In the ninth O site, O(1) is bonded in a bent 120 degrees geometry to one Rb(2), one Ga(1), and one Ge(4) atom. In the tenth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Ga(1), and one Ge(4) atom.