NaSm(CO3)2 crystallizes in the orthorhombic Pmc2_1 space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(3), and four equivalent O(2) atoms. Sm(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and four 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) and two equivalent O(2) atoms. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Sm(1), and one C(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Sm(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Sm(1), and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Sm(1) and one C(1) atom.
NaSm(CO3)2 crystallizes in the orthorhombic Pmc2_1 space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(3), and four equivalent O(2) atoms. The Na(1)-O(1) bond length is 2.52 Å. Both Na(1)-O(3) bond lengths are 2.55 Å. There are two shorter (2.30 Å) and two longer (2.32 Å) Na(1)-O(2) bond lengths. Sm(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. Both Sm(1)-O(1) bond lengths are 2.64 Å. Both Sm(1)-O(2) bond lengths are 2.52 Å. There is one shorter (2.47 Å) and one longer (2.59 Å) Sm(1)-O(4) bond length. There are two shorter (2.52 Å) and two longer (2.61 Å) Sm(1)-O(3) bond lengths. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(4) and two equivalent O(2) atoms. The C(1)-O(4) bond length is 1.31 Å. Both C(1)-O(2) bond lengths are 1.29 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(3) atoms. The C(2)-O(1) bond length is 1.29 Å. Both C(2)-O(3) bond lengths are 1.30 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Sm(1), and one C(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Sm(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Sm(1), and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Sm(1) and one C(1) atom.