A layered chlorophosphate, Na3[Cd4Cl3(HPO4)2(H2PO4)4], containing Na+ ions in the interlamellar space

Abstract

Reaction between CdCl₂·H₂O and NaH₂PO₄·H₂O under hydrothermal conditions gives rise to a new cadmium chlorophosphate of the formula Na₃[Cd₄Cl₃(HPO₄)₂(H₂PO₄)₄], I. This material crystallizes in the orthorhombic system with space group Fmm2 (no. 42). I has macroanionic layers of [Cd₄Cl₃(HPO₄)₂(H₂PO₄)₄]³⁻ with Na⁺ ions in the interlamellar space. The discovery of such compounds suggests that metathetic reactions carried out under hydrothermal conditions may provide a novel route for the synthesis of new open-framework structures.