Na2BeGeO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), and four equivalent O(4) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. Be(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form BeO4 tetrahedra that share corners with four equivalent Ge(1)O4 tetrahedra and  an edgeedge with one Be(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), two equivalent Be(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Be(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Be(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(2), four equivalent Na(1), and one Ge(1) atom.
Na2BeGeO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), and four equivalent O(4) atoms. The Na(1)-O(2) bond length is 2.36 Å. The Na(1)-O(3) bond length is 2.38 Å. There are a spread of Na(1)-O(4) bond distances ranging from 2.40-2.80 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. The Na(2)-O(1) bond length is 2.31 Å. The Na(2)-O(4) bond length is 2.31 Å. There is one shorter (2.54 Å) and one longer (2.73 Å) Na(2)-O(2) bond length. There is one shorter (2.42 Å) and one longer (2.77 Å) Na(2)-O(3) bond length. Be(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form BeO4 tetrahedra that share corners with four equivalent Ge(1)O4 tetrahedra and  an edgeedge with one Be(1)O4 tetrahedra. The Be(1)-O(2) bond length is 1.63 Å. The Be(1)-O(3) bond length is 1.62 Å. Both Be(1)-O(1) bond lengths are 1.69 Å. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra. The Ge(1)-O(1) bond length is 1.79 Å. The Ge(1)-O(2) bond length is 1.79 Å. The Ge(1)-O(3) bond length is 1.79 Å. The Ge(1)-O(4) bond length is 1.75 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), two equivalent Be(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Be(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Be(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(2), four equivalent Na(1), and one Ge(1) atom.