ChemInform Abstract: Exploring a New Structure Family: Alkali Borosulfates Na5[B(SO4)4], A3[B(SO4)3] (A: K, Rb), Li[B(SO4)2], and Li[B(S2O7)2]

The crystal structures of the title compounds are based on corner-linked BO4 and SO4 tetrahedra with varying coordination of the alkali cations.