Na2Cu(NO3)4 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and two equivalent O(5) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one Na(1) and one N(2) atom. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Cu(1), and one N(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Na(1) and one N(1) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one N(1) atom. In the fifth O site, O(4) is bonded in a distorted water-like geometry to one Cu(1) and one N(2) atom. In the sixth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one N(2) atom.
Na2Cu(NO3)4 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and two equivalent O(5) atoms. The Na(1)-O(1) bond length is 2.46 Å. The Na(1)-O(2) bond length is 2.56 Å. The Na(1)-O(3) bond length is 2.41 Å. The Na(1)-O(6) bond length is 2.45 Å. There is one shorter (2.38 Å) and one longer (2.48 Å) Na(1)-O(5) bond length. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. Both Cu(1)-O(1) bond lengths are 1.98 Å. Both Cu(1)-O(4) bond lengths are 2.01 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The N(1)-O(1) bond length is 1.31 Å. The N(1)-O(2) bond length is 1.24 Å. The N(1)-O(3) bond length is 1.25 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The N(2)-O(4) bond length is 1.31 Å. The N(2)-O(5) bond length is 1.25 Å. The N(2)-O(6) bond length is 1.25 Å. There are six inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one Na(1) and one N(2) atom. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Cu(1), and one N(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Na(1) and one N(1) atom. In the fourth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one N(1) atom. In the fifth O site, O(4) is bonded in a distorted water-like geometry to one Cu(1) and one N(2) atom. In the sixth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one N(2) atom.