Citation: Ling-I Hung; Sue-Lein Wang; Hsien-Ming Kao; Kwang-Hwa Lii (2002). Synthesis, Crystal Structure, and Solid State NMR Spectroscopy of NH4[(V2O3)2(4,4'-bpy)2(H2PO4)(PO4)2].0.5H2O, a Mixed-Valence Vanadium(IV,V) Phosphate with a Pillared Layer Structure. Inorganic Chemistry, 41, pp. 3929-3934.