Materials Data on GdH6C4NO9 by Materials Project
GdC4H2O9NH4 crystallizes in the monoclinic P2/c space group. The structure is two-dimensional and consists of two ammonium molecules and one GdC4H2O9 sheet oriented in the (0, 1, 0) direction. In the GdC4H2O9 sheet, Gd3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Gd–O bond distances ranging from 2.38–2.48 Å. There are two inequivalent C3+ sites. In the first 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. 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. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one Gd3+ and two equivalent H1+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C3+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C3+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C3+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Gd3+ and one C3+ atom.