NaEuGeO4 is Spinel-derived structured and crystallizes in the orthorhombic Pnma space group. Na(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaO6 octahedra that share corners with four equivalent Eu(1)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Eu(1)O6 octahedra, and edges with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 61-67°. Eu(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form EuO6 octahedra that share corners with four equivalent Na(1)O6 octahedra, corners with four equivalent Eu(1)O6 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Na(1)O6 octahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-67°. Ge(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form GeO4 tetrahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Eu(1)O6 octahedra,  an edgeedge with one Eu(1)O6 octahedra, and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Na(1), one Eu(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one Eu(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Na(1), two equivalent Eu(1), and one Ge(1) atom.
NaEuGeO4 is Spinel-derived structured and crystallizes in the orthorhombic Pnma space group. Na(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaO6 octahedra that share corners with four equivalent Eu(1)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Eu(1)O6 octahedra, and edges with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 61-67°. Both Na(1)-O(1) bond lengths are 2.45 Å. Both Na(1)-O(2) bond lengths are 2.43 Å. Both Na(1)-O(3) bond lengths are 2.55 Å. Eu(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form EuO6 octahedra that share corners with four equivalent Na(1)O6 octahedra, corners with four equivalent Eu(1)O6 octahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Na(1)O6 octahedra, and  an edgeedge with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-67°. The Eu(1)-O(1) bond length is 2.31 Å. The Eu(1)-O(2) bond length is 2.37 Å. There are two shorter (2.35 Å) and two longer (2.44 Å) Eu(1)-O(3) bond lengths. Ge(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form GeO4 tetrahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Eu(1)O6 octahedra,  an edgeedge with one Eu(1)O6 octahedra, and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-62°. The Ge(1)-O(1) bond length is 1.77 Å. The Ge(1)-O(2) bond length is 1.75 Å. Both Ge(1)-O(3) bond lengths are 1.81 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Na(1), one Eu(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one Eu(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Na(1), two equivalent Eu(1), and one Ge(1) atom.