A New Iodate-Phosphate Pb-2(Io3)(Po4) Achieving Great Improvement In Birefringence Activated By (Io3)(-) Groups

The first divalent-metal iodate-phosphate, Pb-2(IO3)(PO4), has been prepared via the strategy of introducing (IO3)(-) into phosphate. The structure features a unique 3D network where [Pb(IO3)](infinity)(+) and [Pb(PO4)](infinity)(-) layers are alternatively interconnected. The birefringence of Pb-2(IO3)(PO4) is greatly increased to 0.060 at 1064 nm.