NaCrGe2O6 is Esseneite structured and crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Cr(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra and edges with two equivalent Cr(1)O6 octahedra. Ge(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Cr(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Na(1), one Cr(1), and one Ge(1) atom. In the third O site, O(3) is bonded to one Na(1), two equivalent Cr(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing ONaCr2Ge tetrahedra.
NaCrGe2O6 is Esseneite structured and crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Both Na(1)-O(2) bond lengths are 2.52 Å. Both Na(1)-O(3) bond lengths are 2.43 Å. There are two shorter (2.48 Å) and two longer (2.81 Å) Na(1)-O(1) bond lengths. Cr(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra and edges with two equivalent Cr(1)O6 octahedra. Both Cr(1)-O(2) bond lengths are 1.99 Å. There are two shorter (2.05 Å) and two longer (2.09 Å) Cr(1)-O(3) bond lengths. Ge(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Cr(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-62°. The Ge(1)-O(2) bond length is 1.74 Å. The Ge(1)-O(3) bond length is 1.78 Å. There is one shorter (1.77 Å) and one longer (1.79 Å) Ge(1)-O(1) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Na(1), one Cr(1), and one Ge(1) atom. In the third O site, O(3) is bonded to one Na(1), two equivalent Cr(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing ONaCr2Ge tetrahedra.