Li2Cr(H2O3)2 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Cr(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(5), two equivalent O(1), and two equivalent O(2) atoms to form distorted LiO5 square pyramids that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Cr(1)O4 tetrahedra, and edges with two equivalent Li(2)O5 square pyramids. Cr(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form CrO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Li(1)O4 tetrahedra. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) atom. There are six inequivalent O sites. In the first O site, O(2) is bonded to two equivalent Li(2), one H(3), and one H(4) atom to form distorted corner-sharing OLi2H2 tetrahedra. In the second O site, O(3) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the third O site, O(4) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the fourth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Li(2), and one Cr(1) atom. In the fifth O site, O(6) is bonded in a linear geometry to one Li(1) and one Cr(1) atom. In the sixth O site, O(1) is bonded in a distorted water-like geometry to two equivalent Li(2), one H(1), and one H(2) atom.
Li2Cr(H2O3)2 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Cr(1)O4 tetrahedra. The Li(1)-O(3) bond length is 2.01 Å. The Li(1)-O(4) bond length is 1.99 Å. The Li(1)-O(5) bond length is 1.99 Å. The Li(1)-O(6) bond length is 1.97 Å. In the second Li site, Li(2) is bonded to one O(5), two equivalent O(1), and two equivalent O(2) atoms to form distorted LiO5 square pyramids that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Cr(1)O4 tetrahedra, and edges with two equivalent Li(2)O5 square pyramids. The Li(2)-O(5) bond length is 2.05 Å. There is one shorter (2.14 Å) and one longer (2.17 Å) Li(2)-O(1) bond length. There is one shorter (2.08 Å) and one longer (2.10 Å) Li(2)-O(2) bond length. Cr(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form CrO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Li(1)O4 tetrahedra. The Cr(1)-O(3) bond length is 1.67 Å. The Cr(1)-O(4) bond length is 1.68 Å. The Cr(1)-O(5) bond length is 1.67 Å. The Cr(1)-O(6) bond length is 1.64 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) atom. The H(4)-O(2) bond length is 0.99 Å. There are six inequivalent O sites. In the first O site, O(2) is bonded to two equivalent Li(2), one H(3), and one H(4) atom to form distorted corner-sharing OLi2H2 tetrahedra. In the second O site, O(3) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the third O site, O(4) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the fourth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Li(2), and one Cr(1) atom. In the fifth O site, O(6) is bonded in a linear geometry to one Li(1) and one Cr(1) atom. In the sixth O site, O(1) is bonded in a distorted water-like geometry to two equivalent Li(2), one H(1), and one H(2) atom.