The invention provides a stable metal zirconium phosphates having formula (I),
in which X is a metal or a combination of metals selected from Co, Mn, Ni, Cu,
Cd, Fe, Cr, Al, Sn, V, Zn, Sc, Na, Mg, Ca and Si; and n has a molar value in the
range of 1.25 to 22. These metal zirconium phosphates are prepared by sol-gel process.
