Na2Yb(CO3)2F crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(2), one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms. In the second Na site, Na(2) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one F(1) atom. Yb(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(5), two equivalent O(6), and two equivalent F(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second C site, C(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(1) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Na(1), one Na(2), one Yb(1), and one C(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to two equivalent Na(1), one Yb(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Yb(1), and one C(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), one Yb(1), and one C(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Na(2), two equivalent Yb(1), and one C(2) atom. F(1) is bonded in a trigonal planar geometry to one Na(2) and two equivalent Yb(1) atoms.
Na2Yb(CO3)2F crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(2), one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms. The Na(1)-O(2) bond length is 2.78 Å. The Na(1)-O(4) bond length is 2.76 Å. The Na(1)-O(5) bond length is 2.84 Å. There is one shorter (2.41 Å) and one longer (2.50 Å) Na(1)-O(1) bond length. There is one shorter (2.39 Å) and one longer (2.48 Å) Na(1)-O(3) bond length. In the second Na site, Na(2) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one F(1) atom. The Na(2)-O(1) bond length is 2.38 Å. The Na(2)-O(2) bond length is 2.47 Å. The Na(2)-O(4) bond length is 2.45 Å. The Na(2)-O(5) bond length is 2.49 Å. The Na(2)-O(6) bond length is 2.52 Å. The Na(2)-F(1) bond length is 2.29 Å. Yb(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(5), two equivalent O(6), and two equivalent F(1) atoms. The Yb(1)-O(2) bond length is 2.50 Å. The Yb(1)-O(3) bond length is 2.70 Å. The Yb(1)-O(4) bond length is 2.33 Å. The Yb(1)-O(5) bond length is 2.51 Å. There is one shorter (2.45 Å) and one longer (2.50 Å) Yb(1)-O(6) bond length. There is one shorter (2.21 Å) and one longer (2.22 Å) Yb(1)-F(1) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(2) bond length is 1.29 Å. The C(1)-O(3) bond length is 1.29 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The C(2)-O(4) bond length is 1.29 Å. The C(2)-O(5) bond length is 1.29 Å. The C(2)-O(6) bond length is 1.30 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Na(1), one Na(2), one Yb(1), and one C(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to two equivalent Na(1), one Yb(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Yb(1), and one C(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), one Yb(1), and one C(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Na(2), two equivalent Yb(1), and one C(2) atom. F(1) is bonded in a trigonal planar geometry to one Na(2) and two equivalent Yb(1) atoms.