(GeO2)10O2 crystallizes in the monoclinic Cm space group. The structure consists of four water atoms inside a GeO2 framework. In the GeO2 framework, there are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(4), one O(7), and two equivalent O(10) atoms to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra and corners with two equivalent Ge(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. In the second Ge site, Ge(2) is bonded to one O(5), one O(8), and two equivalent O(11) atoms to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra and corners with two equivalent Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 56°. In the third Ge site, Ge(3) is bonded in a 4-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(9) atoms. In the fourth Ge site, Ge(4) is bonded to one O(4), one O(8), two equivalent O(2), and two equivalent O(9) atoms to form corner-sharing GeO6 octahedra. In the fifth Ge site, Ge(5) is bonded to one O(1), one O(10), one O(12), and one O(3) atom to form corner-sharing GeO4 tetrahedra. In the sixth Ge site, Ge(6) is bonded to one O(11), one O(13), one O(2), and one O(3) atom to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and corners with two equivalent Ge(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the seventh Ge site, Ge(7) is bonded to one O(12), one O(9), and two equivalent O(13) atoms to form distorted GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra,  a cornercorner with one Ge(5)O4 tetrahedra, corners with two equivalent Ge(6)O4 tetrahedra, and corners with two equivalent Ge(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(5) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(5) and one Ge(6) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ge(2) and one Ge(3) atom. In the sixth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Ge(1) and one Ge(3) atom. In the seventh O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(4) atom. In the eighth O site, O(9) is bonded in a 3-coordinate geometry to one Ge(3), one Ge(4), and one Ge(7) atom. In the ninth O site, O(10) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(5) atom. In the tenth O site, O(11) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(6) atom. In the eleventh O site, O(12) is bonded in a bent 150 degrees geometry to one Ge(5) and one Ge(7) atom. In the twelfth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Ge(6) and two equivalent Ge(7) atoms.
(GeO2)10O2 crystallizes in the monoclinic Cm space group. The structure consists of four water atoms inside a GeO2 framework. In the GeO2 framework, there are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(4), one O(7), and two equivalent O(10) atoms to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra and corners with two equivalent Ge(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. The Ge(1)-O(4) bond length is 1.77 Å. The Ge(1)-O(7) bond length is 1.76 Å. Both Ge(1)-O(10) bond lengths are 1.76 Å. In the second Ge site, Ge(2) is bonded to one O(5), one O(8), and two equivalent O(11) atoms to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra and corners with two equivalent Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 56°. The Ge(2)-O(5) bond length is 1.77 Å. The Ge(2)-O(8) bond length is 1.75 Å. Both Ge(2)-O(11) bond lengths are 1.77 Å. In the third Ge site, Ge(3) is bonded in a 4-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(9) atoms. The Ge(3)-O(5) bond length is 1.81 Å. The Ge(3)-O(7) bond length is 1.76 Å. Both Ge(3)-O(1) bond lengths are 1.81 Å. Both Ge(3)-O(9) bond lengths are 2.42 Å. In the fourth Ge site, Ge(4) is bonded to one O(4), one O(8), two equivalent O(2), and two equivalent O(9) atoms to form corner-sharing GeO6 octahedra. The Ge(4)-O(4) bond length is 1.86 Å. The Ge(4)-O(8) bond length is 1.82 Å. Both Ge(4)-O(2) bond lengths are 1.89 Å. Both Ge(4)-O(9) bond lengths are 2.03 Å. In the fifth Ge site, Ge(5) is bonded to one O(1), one O(10), one O(12), and one O(3) atom to form corner-sharing GeO4 tetrahedra. The Ge(5)-O(1) bond length is 1.75 Å. The Ge(5)-O(10) bond length is 1.74 Å. The Ge(5)-O(12) bond length is 1.78 Å. The Ge(5)-O(3) bond length is 1.79 Å. In the sixth Ge site, Ge(6) is bonded to one O(11), one O(13), one O(2), and one O(3) atom to form GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and corners with two equivalent Ge(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. The Ge(6)-O(11) bond length is 1.74 Å. The Ge(6)-O(13) bond length is 1.85 Å. The Ge(6)-O(2) bond length is 1.74 Å. The Ge(6)-O(3) bond length is 1.77 Å. In the seventh Ge site, Ge(7) is bonded to one O(12), one O(9), and two equivalent O(13) atoms to form distorted GeO4 tetrahedra that share  a cornercorner with one Ge(4)O6 octahedra,  a cornercorner with one Ge(5)O4 tetrahedra, corners with two equivalent Ge(6)O4 tetrahedra, and corners with two equivalent Ge(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. The Ge(7)-O(12) bond length is 1.74 Å. The Ge(7)-O(9) bond length is 1.74 Å. There is one shorter (1.84 Å) and one longer (2.48 Å) Ge(7)-O(13) bond length. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(5) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ge(5) and one Ge(6) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Ge(2) and one Ge(3) atom. In the sixth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Ge(1) and one Ge(3) atom. In the seventh O site, O(8) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(4) atom. In the eighth O site, O(9) is bonded in a 3-coordinate geometry to one Ge(3), one Ge(4), and one Ge(7) atom. In the ninth O site, O(10) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(5) atom. In the tenth O site, O(11) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(6) atom. In the eleventh O site, O(12) is bonded in a bent 150 degrees geometry to one Ge(5) and one Ge(7) atom. In the twelfth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Ge(6) and two equivalent Ge(7) atoms.