Na2Mo3O13 crystallizes in the monoclinic Cm 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(12), one O(6), one O(9), two equivalent O(10), and two equivalent O(3) atoms. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(13), one O(5), one O(9), and two equivalent O(4) atoms. There are three inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a 5-coordinate geometry to one O(3), one O(5), one O(8), and two equivalent O(1) atoms. In the second Mo site, Mo(2) is bonded in a 6-coordinate geometry to one O(4), one O(6), one O(7), one O(8), and two equivalent O(2) atoms. In the third Mo site, Mo(3) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(2), and two equivalent O(7) atoms. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mo(3) and two equivalent Mo(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mo(3) and two equivalent Mo(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Mo(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Na(2) and one Mo(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Na(2) and one Mo(1) atom. In the sixth O site, O(6) is bonded in a linear geometry to one Na(1) and one Mo(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mo(2) and two equivalent Mo(3) atoms. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(2) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Na(1) and one Na(2) atom. In the tenth O site, O(10) is bonded in an L-shaped geometry to two equivalent Na(1) atoms. In the eleventh O site, O(11) is bonded in a single-bond geometry to one Mo(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one Mo(3) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one Na(2) atom.
Na2Mo3O13 crystallizes in the monoclinic Cm 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(12), one O(6), one O(9), two equivalent O(10), and two equivalent O(3) atoms. The Na(1)-O(12) bond length is 2.44 Å. The Na(1)-O(6) bond length is 2.29 Å. The Na(1)-O(9) bond length is 2.84 Å. Both Na(1)-O(10) bond lengths are 2.56 Å. Both Na(1)-O(3) bond lengths are 2.42 Å. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(13), one O(5), one O(9), and two equivalent O(4) atoms. The Na(2)-O(13) bond length is 2.69 Å. The Na(2)-O(5) bond length is 2.32 Å. The Na(2)-O(9) bond length is 3.05 Å. Both Na(2)-O(4) bond lengths are 2.31 Å. There are three inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a 5-coordinate geometry to one O(3), one O(5), one O(8), and two equivalent O(1) atoms. The Mo(1)-O(3) bond length is 1.78 Å. The Mo(1)-O(5) bond length is 1.74 Å. The Mo(1)-O(8) bond length is 1.99 Å. Both Mo(1)-O(1) bond lengths are 1.99 Å. In the second Mo site, Mo(2) is bonded in a 6-coordinate geometry to one O(4), one O(6), one O(7), one O(8), and two equivalent O(2) atoms. The Mo(2)-O(4) bond length is 1.76 Å. The Mo(2)-O(6) bond length is 1.75 Å. The Mo(2)-O(7) bond length is 2.41 Å. The Mo(2)-O(8) bond length is 2.03 Å. Both Mo(2)-O(2) bond lengths are 1.99 Å. In the third Mo site, Mo(3) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(2), and two equivalent O(7) atoms. The Mo(3)-O(1) bond length is 2.58 Å. The Mo(3)-O(11) bond length is 1.72 Å. The Mo(3)-O(12) bond length is 1.73 Å. The Mo(3)-O(2) bond length is 2.28 Å. Both Mo(3)-O(7) bond lengths are 1.98 Å. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mo(3) and two equivalent Mo(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mo(3) and two equivalent Mo(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Mo(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Na(2) and one Mo(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Na(2) and one Mo(1) atom. In the sixth O site, O(6) is bonded in a linear geometry to one Na(1) and one Mo(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mo(2) and two equivalent Mo(3) atoms. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(2) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Na(1) and one Na(2) atom. In the tenth O site, O(10) is bonded in an L-shaped geometry to two equivalent Na(1) atoms. In the eleventh O site, O(11) is bonded in a single-bond geometry to one Mo(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one Mo(3) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one Na(2) atom.