Citation: Wang, S. L.; Kang, H. Y.; Cheng, C. Y.; Lii, K. H. (1991). Hydrothermal synthesis and structural characterization of two layered mixed-valence vanadyl phosphate hydrates Na0.50VOPO4.2.0H2O and K0.50VOPO4.1.5H2O. Inorganic Chemistry, 30, pp. 3496-3499.