YH2(CO3)2 crystallizes in the orthorhombic C222_1 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one O(7), two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) 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(5) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(7) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Y(1), one Y(2), and one C(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Y(1), one Y(2), and one C(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Y(1), one Y(2), and one C(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Y(1) and two equivalent H(2) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Y(2) and two equivalent H(1) atoms.
YH2(CO3)2 crystallizes in the orthorhombic C222_1 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. The Y(1)-O(6) bond length is 2.36 Å. Both Y(1)-O(1) bond lengths are 2.41 Å. Both Y(1)-O(2) bond lengths are 2.43 Å. Both Y(1)-O(3) bond lengths are 2.41 Å. Both Y(1)-O(5) bond lengths are 2.48 Å. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one O(7), two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. The Y(2)-O(7) bond length is 2.36 Å. Both Y(2)-O(1) bond lengths are 2.44 Å. Both Y(2)-O(2) bond lengths are 2.41 Å. Both Y(2)-O(4) bond lengths are 2.43 Å. Both Y(2)-O(5) bond lengths are 2.47 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(1)-O(3) bond length is 1.27 Å. The C(1)-O(4) bond length is 1.27 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(5) atom. The C(2)-O(1) bond length is 1.29 Å. The C(2)-O(2) bond length is 1.29 Å. The C(2)-O(5) bond length is 1.31 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(7) atom. The H(1)-O(7) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.99 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Y(1), one Y(2), and one C(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Y(1), one Y(2), and one C(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Y(2) and one C(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Y(1), one Y(2), and one C(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Y(1) and two equivalent H(2) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Y(2) and two equivalent H(1) atoms.