A. Datta et al., NOVEL MODIFICATIONS OF THE STRUCTURE OF THE LAYERED VANADYL HYDROGENPHOSPHATE VO(HPO4).0.5H2O, Journal of the Chemical Society. Dalton transactions, (14), 1994, pp. 2145-2149
The addition of metal ions such as Zn2+, Ni2+ and Pd2+ during the prep
aration of the layered vanadyl hydrogenphosphate VO(HPO4).0.5H2O in aq
ueous media led to the formation of a new phase which is very differen
t from that of the parent compound. This phase, which appears to be st
ructurally similar to the vanadium(v) phosphate VO(PO4).2H2O, is a mix
ed-valent vanadium compound with an expanded c-axis spacing in which t
he incorporated metal ions, in their divalent state, appear to be lodg
ed in the interlayer region.