Materials Data on NaMgH2C3O7 by Materials Project
NaMgC3H2O7 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.34–2.84 Å. Mg2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Mg–O bond distances ranging from 2.06–2.16 Å. There are three inequivalent C3+ sites. In the first C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.27 Å. In the second C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.27 Å. In the third C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.27 Å) C–O bond length. There are two 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 (1.01 Å) and one longer (1.72 Å) H–O bond length. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Mg2+, and one C3+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Na1+, one Mg2+, and one C3+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Mg2+ and one C3+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Mg2+, and one C3+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one C3+, and one H1+ atom. In the sixth O2- site, O2- is bonded in a distorted water-like geometry to one Na1+, one Mg2+, and two H1+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Mg2+, and one C3+ atom.