Terbium(III) hydrogendiphosphate(V) tetrahydrate

Abstract

The Tb atom of the title compound, TbHP2O7·4H2O, is coordinated by the O atoms of three symmetrically independent water mol­ecules and by five O atoms belonging to HP2O7 − groups. The TbO8 polyhedra are inter­connected by the diphospate anions, forming a three-dimensional network which is additionally stabilized by O—H⋯O hydrogen bonding between water mol­ecules and O atoms of the HP2O7 − anions. Uncoordinated water mol­ecules are situated in channels and are connected via hydrogen bonds with the framework.