Structural aspects of lithium insertion in oxides: LixReO3 and Li2FeV3O8
Abstract We have determined the crystal structures of LiReO 3 , Li 2 ReO 3 and Li 2 FeV 3 O 8 , obtained by Li insertion of ReO 3 and FeV 3 O 8 , by neutron diffraction powder profile analysis. The ReO 3 host lattice is exclusively corner shared and undergoes significant twisting on Li insertion. The FeV 3 O 8 host lattice is extensively edge shared and changes little on Li insertion. The Li is accommodated in 6 coordinate sites in the rhenates and 5 coordinate sites in the iron vanadate.