NaNbGeSi2SO12 crystallizes in the monoclinic Cc space group. Na(1) is bonded in a distorted hexagonal planar geometry to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom. Nb(1) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(6) atom to form NbO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent S(1)O4 tetrahedra. Ge(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(7), one O(8), and one O(9) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(4), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-31°. In the second Si site, Si(2) is bonded to one O(11), one O(2), one O(6), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-31°. S(1) is bonded to one O(12), one O(3), one O(5), and one O(8) atom to form SO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-35°. There are twelve inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one Nb(1) and one Si(2) atom. In the second O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Ge(1), and one Si(1) atom. In the third O site, O(8) is bonded in a distorted single-bond geometry to one Na(1), one Ge(1), and one S(1) atom. In the fourth O site, O(9) is bonded in a 3-coordinate geometry to one Na(1), one Ge(1), and one Si(2) atom. In the fifth O site, O(10) is bonded in a 3-coordinate geometry to one Na(1), one Nb(1), and one Si(1) atom. In the sixth O site, O(11) is bonded in a 3-coordinate geometry to one Na(1), one Nb(1), and one Si(2) atom. In the seventh O site, O(12) is bonded in a 3-coordinate geometry to one Na(1), one Nb(1), and one S(1) atom. In the eighth O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(1) and one Si(1) atom. In the ninth O site, O(2) is bonded in a bent 150 degrees geometry to one Ge(1) and one Si(2) atom. In the tenth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ge(1) and one S(1) atom. In the eleventh O site, O(4) is bonded in a bent 150 degrees geometry to one Nb(1) and one Si(1) atom. In the twelfth O site, O(5) is bonded in a bent 150 degrees geometry to one Nb(1) and one S(1) atom.
NaNbGeSi2SO12 crystallizes in the monoclinic Cc space group. Na(1) is bonded in a distorted hexagonal planar geometry to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom. The Na(1)-O(10) bond length is 2.55 Å. The Na(1)-O(11) bond length is 2.62 Å. The Na(1)-O(12) bond length is 2.72 Å. The Na(1)-O(7) bond length is 2.42 Å. The Na(1)-O(8) bond length is 2.60 Å. The Na(1)-O(9) bond length is 2.51 Å. Nb(1) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(6) atom to form NbO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent S(1)O4 tetrahedra. The Nb(1)-O(10) bond length is 1.99 Å. The Nb(1)-O(11) bond length is 1.98 Å. The Nb(1)-O(12) bond length is 2.04 Å. The Nb(1)-O(4) bond length is 1.95 Å. The Nb(1)-O(5) bond length is 2.05 Å. The Nb(1)-O(6) bond length is 1.93 Å. Ge(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(7), one O(8), and one O(9) atom. The Ge(1)-O(1) bond length is 1.77 Å. The Ge(1)-O(2) bond length is 1.82 Å. The Ge(1)-O(3) bond length is 2.32 Å. The Ge(1)-O(7) bond length is 1.81 Å. The Ge(1)-O(8) bond length is 2.30 Å. The Ge(1)-O(9) bond length is 1.86 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(4), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-31°. The Si(1)-O(1) bond length is 1.62 Å. The Si(1)-O(10) bond length is 1.64 Å. The Si(1)-O(4) bond length is 1.63 Å. The Si(1)-O(7) bond length is 1.63 Å. In the second Si site, Si(2) is bonded to one O(11), one O(2), one O(6), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-31°. The Si(2)-O(11) bond length is 1.65 Å. The Si(2)-O(2) bond length is 1.64 Å. The Si(2)-O(6) bond length is 1.65 Å. The Si(2)-O(9) bond length is 1.64 Å. S(1) is bonded to one O(12), one O(3), one O(5), and one O(8) atom to form SO4 tetrahedra that share corners with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-35°. The S(1)-O(12) bond length is 1.51 Å. The S(1)-O(3) bond length is 1.46 Å. The S(1)-O(5) bond length is 1.49 Å. The S(1)-O(8) bond length is 1.46 Å. There are twelve inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one Nb(1) and one Si(2) atom. In the second O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Ge(1), and one Si(1) atom. In the third O site, O(8) is bonded in a distorted single-bond geometry to one Na(1), one Ge(1), and one S(1) atom. In the fourth O site, O(9) is bonded in a 3-coordinate geometry to one Na(1), one Ge(1), and one Si(2) atom. In the fifth O site, O(10) is bonded in a 3-coordinate geometry to one Na(1), one Nb(1), and one Si(1) atom. In the sixth O site, O(11) is bonded in a 3-coordinate geometry to one Na(1), one Nb(1), and one Si(2) atom. In the seventh O site, O(12) is bonded in a 3-coordinate geometry to one Na(1), one Nb(1), and one S(1) atom. In the eighth O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(1) and one Si(1) atom. In the ninth O site, O(2) is bonded in a bent 150 degrees geometry to one Ge(1) and one Si(2) atom. In the tenth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ge(1) and one S(1) atom. In the eleventh O site, O(4) is bonded in a bent 150 degrees geometry to one Nb(1) and one Si(1) atom. In the twelfth O site, O(5) is bonded in a bent 150 degrees geometry to one Nb(1) and one S(1) atom.