Na3Eu(CO3)3 crystallizes in the orthorhombic Ama2 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(4), one O(6), two equivalent O(1), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the third Na site, Na(3) is bonded in a 9-coordinate geometry to one O(4), one O(5), one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Eu(1) is bonded in a 9-coordinate geometry to one O(4), one O(5), one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Eu(1), and one C(1) atom. In the second O site, O(5) is bonded in a 5-coordinate geometry to one Na(3), two equivalent Na(2), one Eu(1), and one C(1) atom. In the third O site, O(6) is bonded in a distorted square co-planar geometry to one Na(1), one Na(3), one Eu(1), and one C(1) atom. In the fourth O site, O(1) is bonded to one Na(1), one Na(2), one Na(3), one Eu(1), and one C(2) atom to form a mixture of distorted corner, edge, and face-sharing ONa3EuC trigonal bipyramids. In the fifth O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Eu(1), and one C(2) atom to form a mixture of distorted corner, edge, and face-sharing ONa3EuC trigonal bipyramids. In the sixth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Eu(1), and one C(2) atom.
Na3Eu(CO3)3 crystallizes in the orthorhombic Ama2 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(4), one O(6), two equivalent O(1), and two equivalent O(2) atoms. The Na(1)-O(4) bond length is 2.48 Å. The Na(1)-O(6) bond length is 2.41 Å. Both Na(1)-O(1) bond lengths are 2.32 Å. Both Na(1)-O(2) bond lengths are 2.37 Å. In the second Na site, Na(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. Both Na(2)-O(1) bond lengths are 2.61 Å. Both Na(2)-O(2) bond lengths are 2.56 Å. Both Na(2)-O(3) bond lengths are 2.48 Å. Both Na(2)-O(5) bond lengths are 2.67 Å. In the third Na site, Na(3) is bonded in a 9-coordinate geometry to one O(4), one O(5), one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. The Na(3)-O(4) bond length is 2.43 Å. The Na(3)-O(5) bond length is 2.42 Å. The Na(3)-O(6) bond length is 2.73 Å. Both Na(3)-O(1) bond lengths are 2.65 Å. Both Na(3)-O(2) bond lengths are 2.68 Å. Both Na(3)-O(3) bond lengths are 2.70 Å. Eu(1) is bonded in a 9-coordinate geometry to one O(4), one O(5), one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. The Eu(1)-O(4) bond length is 2.58 Å. The Eu(1)-O(5) bond length is 2.48 Å. The Eu(1)-O(6) bond length is 2.46 Å. Both Eu(1)-O(1) bond lengths are 2.53 Å. Both Eu(1)-O(2) bond lengths are 2.54 Å. Both Eu(1)-O(3) bond lengths are 2.53 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The C(1)-O(4) bond length is 1.29 Å. The C(1)-O(5) bond length is 1.32 Å. The C(1)-O(6) bond length is 1.29 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(2)-O(1) bond length is 1.30 Å. The C(2)-O(2) bond length is 1.30 Å. The C(2)-O(3) bond length is 1.29 Å. There are six inequivalent O sites. In the first O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Eu(1), and one C(1) atom. In the second O site, O(5) is bonded in a 5-coordinate geometry to one Na(3), two equivalent Na(2), one Eu(1), and one C(1) atom. In the third O site, O(6) is bonded in a distorted square co-planar geometry to one Na(1), one Na(3), one Eu(1), and one C(1) atom. In the fourth O site, O(1) is bonded to one Na(1), one Na(2), one Na(3), one Eu(1), and one C(2) atom to form a mixture of distorted corner, edge, and face-sharing ONa3EuC trigonal bipyramids. In the fifth O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Eu(1), and one C(2) atom to form a mixture of distorted corner, edge, and face-sharing ONa3EuC trigonal bipyramids. In the sixth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Eu(1), and one C(2) atom.