Ge7(H3O5)4(H2O)3 crystallizes in the triclinic P1 space group. The structure consists of three water molecules inside a Ge7(H3O5)4 framework. In the Ge7(H3O5)4 framework, there are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(2)O6 octahedra,  an edgeedge with one Ge(3)O6 octahedra, and  an edgeedge with one Ge(4)O6 octahedra. In the second Ge site, Ge(2) is bonded to one O(10), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(1)O6 octahedra,  an edgeedge with one Ge(3)O6 octahedra, and  an edgeedge with one Ge(4)O6 octahedra. In the third Ge site, Ge(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(2), and one O(4) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(1)O6 octahedra,  an edgeedge with one Ge(2)O6 octahedra, and  an edgeedge with one Ge(4)O6 octahedra. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(14), one O(15), one O(16), one O(3), and one O(4) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(1)O6 octahedra,  an edgeedge with one Ge(2)O6 octahedra, and  an edgeedge with one Ge(3)O6 octahedra. In the fifth Ge site, Ge(5) is bonded to one O(11), one O(14), one O(5), and one O(8) atom to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-65°. In the sixth Ge site, Ge(6) is bonded to one O(12), one O(15), one O(6), and one O(9) atom to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-60°. In the seventh Ge site, Ge(7) is bonded to one O(10), one O(13), one O(16), and one O(7) atom to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-58°. There are twelve inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(17) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(10) and one O(17) atom. In the third H site, H(3) is bonded in a linear geometry to one O(18) and one O(8) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(18) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(18) atom. In the sixth H site, H(10) is bonded in a single-bond geometry to one O(7) atom. In the seventh H site, H(13) is bonded in a single-bond geometry to one O(22) atom. In the eighth H site, H(14) is bonded in a linear geometry to one O(22) and one O(6) atom. In the ninth H site, H(15) is bonded in a single-bond geometry to one O(22) atom. In the tenth H site, H(16) is bonded in a single-bond geometry to one O(23) atom. In the eleventh H site, H(17) is bonded in a single-bond geometry to one O(23) atom. In the twelfth H site, H(18) is bonded in a linear geometry to one O(17) and one O(23) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Ge(1), one Ge(3), and one Ge(4) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ge(1), one Ge(2), and one Ge(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ge(1), one Ge(2), and one Ge(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ge(2), one Ge(3), and one Ge(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(5) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ge(1), one Ge(6), and one H(14) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Ge(1), one Ge(7), and one H(10) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Ge(2), one Ge(5), and one H(3) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(6) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Ge(2), one Ge(7), and one H(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(6) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(5) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(6) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(7) atom. In the seventeenth O site, O(17) is bonded in a trigonal non-coplanar geometry to one H(1), one H(18), and one H(2) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal non-coplanar geometry to one H(3), one H(4), and one H(5) atom. In the nineteenth O site, O(22) is bonded in a trigonal non-coplanar geometry to one H(13), one H(14), and one H(15) atom. In the twentieth O site, O(23) is bonded in a trigonal non-coplanar geometry to one H(16), one H(17), and one H(18) atom.
Ge7(H3O5)4(H2O)3 crystallizes in the triclinic P1 space group. The structure consists of three water molecules inside a Ge7(H3O5)4 framework. In the Ge7(H3O5)4 framework, there are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(2)O6 octahedra,  an edgeedge with one Ge(3)O6 octahedra, and  an edgeedge with one Ge(4)O6 octahedra. The Ge(1)-O(1) bond length is 1.91 Å. The Ge(1)-O(2) bond length is 1.99 Å. The Ge(1)-O(3) bond length is 1.91 Å. The Ge(1)-O(5) bond length is 1.85 Å. The Ge(1)-O(6) bond length is 1.90 Å. The Ge(1)-O(7) bond length is 2.07 Å. In the second Ge site, Ge(2) is bonded to one O(10), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(1)O6 octahedra,  an edgeedge with one Ge(3)O6 octahedra, and  an edgeedge with one Ge(4)O6 octahedra. The Ge(2)-O(10) bond length is 1.87 Å. The Ge(2)-O(2) bond length is 1.96 Å. The Ge(2)-O(3) bond length is 1.90 Å. The Ge(2)-O(4) bond length is 2.00 Å. The Ge(2)-O(8) bond length is 1.99 Å. The Ge(2)-O(9) bond length is 1.84 Å. In the third Ge site, Ge(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(2), and one O(4) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(1)O6 octahedra,  an edgeedge with one Ge(2)O6 octahedra, and  an edgeedge with one Ge(4)O6 octahedra. The Ge(3)-O(1) bond length is 2.01 Å. The Ge(3)-O(11) bond length is 1.86 Å. The Ge(3)-O(12) bond length is 1.87 Å. The Ge(3)-O(13) bond length is 1.84 Å. The Ge(3)-O(2) bond length is 2.00 Å. The Ge(3)-O(4) bond length is 2.02 Å. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(14), one O(15), one O(16), one O(3), and one O(4) atom to form GeO6 octahedra that share  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Ge(1)O6 octahedra,  an edgeedge with one Ge(2)O6 octahedra, and  an edgeedge with one Ge(3)O6 octahedra. The Ge(4)-O(1) bond length is 2.07 Å. The Ge(4)-O(14) bond length is 1.82 Å. The Ge(4)-O(15) bond length is 1.88 Å. The Ge(4)-O(16) bond length is 1.87 Å. The Ge(4)-O(3) bond length is 2.15 Å. The Ge(4)-O(4) bond length is 1.93 Å. In the fifth Ge site, Ge(5) is bonded to one O(11), one O(14), one O(5), and one O(8) atom to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-65°. The Ge(5)-O(11) bond length is 1.74 Å. The Ge(5)-O(14) bond length is 1.74 Å. The Ge(5)-O(5) bond length is 1.77 Å. The Ge(5)-O(8) bond length is 1.84 Å. In the sixth Ge site, Ge(6) is bonded to one O(12), one O(15), one O(6), and one O(9) atom to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-60°. The Ge(6)-O(12) bond length is 1.75 Å. The Ge(6)-O(15) bond length is 1.76 Å. The Ge(6)-O(6) bond length is 1.82 Å. The Ge(6)-O(9) bond length is 1.75 Å. In the seventh Ge site, Ge(7) is bonded to one O(10), one O(13), one O(16), and one O(7) atom to form corner-sharing GeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-58°. The Ge(7)-O(10) bond length is 1.76 Å. The Ge(7)-O(13) bond length is 1.74 Å. The Ge(7)-O(16) bond length is 1.75 Å. The Ge(7)-O(7) bond length is 1.86 Å. There are twelve inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(17) atom. The H(1)-O(17) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(10) and one O(17) atom. The H(2)-O(10) bond length is 1.75 Å. The H(2)-O(17) bond length is 1.01 Å. In the third H site, H(3) is bonded in a linear geometry to one O(18) and one O(8) atom. The H(3)-O(18) bond length is 1.58 Å. The H(3)-O(8) bond length is 1.04 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(18) atom. The H(4)-O(18) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(18) atom. The H(5)-O(18) bond length is 0.98 Å. In the sixth H site, H(10) is bonded in a single-bond geometry to one O(7) atom. The H(10)-O(7) bond length is 1.00 Å. In the seventh H site, H(13) is bonded in a single-bond geometry to one O(22) atom. The H(13)-O(22) bond length is 1.01 Å. In the eighth H site, H(14) is bonded in a linear geometry to one O(22) and one O(6) atom. The H(14)-O(22) bond length is 1.20 Å. The H(14)-O(6) bond length is 1.22 Å. In the ninth H site, H(15) is bonded in a single-bond geometry to one O(22) atom. The H(15)-O(22) bond length is 0.99 Å. In the tenth H site, H(16) is bonded in a single-bond geometry to one O(23) atom. The H(16)-O(23) bond length is 0.98 Å. In the eleventh H site, H(17) is bonded in a single-bond geometry to one O(23) atom. The H(17)-O(23) bond length is 1.00 Å. In the twelfth H site, H(18) is bonded in a linear geometry to one O(17) and one O(23) atom. The H(18)-O(17) bond length is 1.20 Å. The H(18)-O(23) bond length is 1.24 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Ge(1), one Ge(3), and one Ge(4) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ge(1), one Ge(2), and one Ge(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ge(1), one Ge(2), and one Ge(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ge(2), one Ge(3), and one Ge(4) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(5) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ge(1), one Ge(6), and one H(14) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Ge(1), one Ge(7), and one H(10) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Ge(2), one Ge(5), and one H(3) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(6) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Ge(2), one Ge(7), and one H(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(6) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ge(3) and one Ge(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(5) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(6) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one Ge(4) and one Ge(7) atom. In the seventeenth O site, O(17) is bonded in a trigonal non-coplanar geometry to one H(1), one H(18), and one H(2) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal non-coplanar geometry to one H(3), one H(4), and one H(5) atom. In the nineteenth O site, O(22) is bonded in a trigonal non-coplanar geometry to one H(13), one H(14), and one H(15) atom. In the twentieth O site, O(23) is bonded in a trigonal non-coplanar geometry to one H(16), one H(17), and one H(18) atom.