Materials Data on KHCO2 by Materials Project
KHCO2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. K1+ is bonded to eight equivalent O2- atoms to form a mixture of face, edge, and corner-sharing KO8 hexagonal bipyramids. There are four shorter (2.85 Å) and four longer (3.03 Å) K–O bond lengths. C2+ is bonded in a trigonal planar geometry to one H1+ and two equivalent O2- atoms. The C–H bond length is 1.11 Å. Both C–O bond lengths are 1.27 Å. H1+ is bonded in a single-bond geometry to one C2+ atom. O2- is bonded in a distorted single-bond geometry to four equivalent K1+ and one C2+ atom.
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