(Rb3Ge7O19)2H2O2 crystallizes in the trigonal R3m space group. The structure consists of three water molecules inside a Rb3Ge7O19 framework. In the Rb3Ge7O19 framework, Rb(1) is bonded in a 11-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the second Ge site, Ge(2) is bonded to three equivalent O(3) and three equivalent O(7) atoms to form corner-sharing GeO6 octahedra. In the third Ge site, Ge(3) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(5), and two equivalent O(7) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to three equivalent Rb(1) atoms. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Rb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent Rb(1), one Ge(1), and one Ge(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Ge(1), and one Ge(3) atom. In the sixth O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ge(2) and two equivalent Ge(3) atoms.
(Rb3Ge7O19)2H2O2 crystallizes in the trigonal R3m space group. The structure consists of three water molecules inside a Rb3Ge7O19 framework. In the Rb3Ge7O19 framework, Rb(1) is bonded in a 11-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms. The Rb(1)-O(1) bond length is 3.26 Å. Both Rb(1)-O(2) bond lengths are 3.10 Å. Both Rb(1)-O(3) bond lengths are 3.25 Å. Both Rb(1)-O(4) bond lengths are 3.18 Å. There are two shorter (3.19 Å) and two longer (3.20 Å) Rb(1)-O(5) bond lengths. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. The Ge(1)-O(3) bond length is 1.76 Å. The Ge(1)-O(4) bond length is 1.78 Å. Both Ge(1)-O(5) bond lengths are 1.78 Å. In the second Ge site, Ge(2) is bonded to three equivalent O(3) and three equivalent O(7) atoms to form corner-sharing GeO6 octahedra. All Ge(2)-O(3) bond lengths are 1.84 Å. All Ge(2)-O(7) bond lengths are 2.05 Å. In the third Ge site, Ge(3) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(5), and two equivalent O(7) atoms. The Ge(3)-O(4) bond length is 1.80 Å. Both Ge(3)-O(5) bond lengths are 1.82 Å. Both Ge(3)-O(7) bond lengths are 2.07 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to three equivalent Rb(1) atoms. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Rb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent Rb(1), one Ge(1), and one Ge(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Ge(1), and one Ge(3) atom. In the sixth O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ge(2) and two equivalent Ge(3) atoms.