NaNbGeO5 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms. Nb(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form NbO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 37°. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form GeO4 tetrahedra that share corners with four equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-56°. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Nb(1), and one Ge(1) atom to form distorted edge-sharing ONa2NbGe tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Nb(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Nb(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Na(1) and two equivalent Nb(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one Nb(1), and one Ge(1) atom.
NaNbGeO5 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms. The Na(1)-O(2) bond length is 2.53 Å. The Na(1)-O(3) bond length is 2.48 Å. The Na(1)-O(4) bond length is 2.36 Å. The Na(1)-O(5) bond length is 2.59 Å. There is one shorter (2.52 Å) and one longer (2.54 Å) Na(1)-O(1) bond length. Nb(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form NbO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra and corners with four equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 37°. The Nb(1)-O(1) bond length is 2.07 Å. The Nb(1)-O(2) bond length is 2.02 Å. The Nb(1)-O(3) bond length is 2.02 Å. The Nb(1)-O(5) bond length is 2.00 Å. There is one shorter (1.83 Å) and one longer (2.23 Å) Nb(1)-O(4) bond length. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form GeO4 tetrahedra that share corners with four equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-56°. The Ge(1)-O(1) bond length is 1.78 Å. The Ge(1)-O(2) bond length is 1.77 Å. The Ge(1)-O(3) bond length is 1.77 Å. The Ge(1)-O(5) bond length is 1.77 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Nb(1), and one Ge(1) atom to form distorted edge-sharing ONa2NbGe tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Nb(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Nb(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Na(1) and two equivalent Nb(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one Nb(1), and one Ge(1) atom.