Materials Data on CdH4(C2O3)2 by Materials Project

CdC4H4O6 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one CdC4H4O6 sheet oriented in the (0, 0, 1) direction. Cd2+ is bonded to six O2- atoms to form corner-sharing CdO6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are a spread of Cd–O bond distances ranging from 2.26–2.53 Å. There are four inequivalent C+1.50+ sites. In the first C+1.50+ site, C+1.50+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.28 Å. In the second C+1.50+ site, C+1.50+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.26 Å. In the third C+1.50+ site, C+1.50+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.26 Å. In the fourth C+1.50+ site, C+1.50+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.26 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.73 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fourth H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.60 Å) H–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cd2+ and one C+1.50+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one C+1.50+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cd2+ and one C+1.50+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one Cd2+ and one C+1.50+ atom. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one Cd2+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Cd2+ and two H1+ atoms.