Na2YC2HO7 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 distorted octahedral geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(2), one O(4), one O(6), two equivalent O(3), and two equivalent O(5) atoms. Y(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(6), two equivalent O(1), and two equivalent O(7) 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(4) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(6) atom. H(1) is bonded in a single-bond geometry to one O(7) atom. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Na(2), and one C(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to one Na(1), one Na(2), one Y(1), and one C(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Y(1), and one H(1) atom. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Y(1), and one C(1) atom. In the fifth O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Y(1), and one C(1) atom. In the sixth O site, O(3) is bonded to two equivalent Na(2), one Y(1), and one C(2) atom to form distorted corner-sharing ONa2YC tetrahedra. In the seventh O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Y(1), and one C(1) atom.
Na2YC2HO7 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 distorted octahedral geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. The Na(1)-O(1) bond length is 2.58 Å. The Na(1)-O(2) bond length is 2.41 Å. The Na(1)-O(4) bond length is 2.53 Å. The Na(1)-O(5) bond length is 2.29 Å. The Na(1)-O(6) bond length is 2.48 Å. The Na(1)-O(7) bond length is 2.49 Å. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(2), one O(4), one O(6), two equivalent O(3), and two equivalent O(5) atoms. The Na(2)-O(2) bond length is 2.75 Å. The Na(2)-O(4) bond length is 2.78 Å. The Na(2)-O(6) bond length is 2.90 Å. There is one shorter (2.40 Å) and one longer (2.61 Å) Na(2)-O(3) bond length. There is one shorter (2.42 Å) and one longer (2.62 Å) Na(2)-O(5) bond length. Y(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(6), two equivalent O(1), and two equivalent O(7) atoms. The Y(1)-O(2) bond length is 2.47 Å. The Y(1)-O(3) bond length is 2.44 Å. The Y(1)-O(4) bond length is 2.29 Å. The Y(1)-O(6) bond length is 2.39 Å. There is one shorter (2.43 Å) and one longer (2.45 Å) Y(1)-O(1) bond length. There is one shorter (2.27 Å) and one longer (2.33 Å) Y(1)-O(7) 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(4) atom. The C(1)-O(1) bond length is 1.31 Å. The C(1)-O(2) bond length is 1.30 Å. The C(1)-O(4) bond length is 1.28 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(6) atom. The C(2)-O(3) bond length is 1.31 Å. The C(2)-O(5) bond length is 1.28 Å. The C(2)-O(6) bond length is 1.32 Å. H(1) is bonded in a single-bond geometry to one O(7) atom. The H(1)-O(7) bond length is 0.98 Å. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Na(2), and one C(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to one Na(1), one Na(2), one Y(1), and one C(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Y(1), and one H(1) atom. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Y(1), and one C(1) atom. In the fifth O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Y(1), and one C(1) atom. In the sixth O site, O(3) is bonded to two equivalent Na(2), one Y(1), and one C(2) atom to form distorted corner-sharing ONa2YC tetrahedra. In the seventh O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Y(1), and one C(1) atom.