Citation: Mao, Jiang-Gao; Wang, Zhike; Clearfield, Abraham (2002). The role of deprotonation of the ligand on the structures of metal phosphonates: synthesis, characterization and crystal structures of two new metal diphosphonates with a 1D double chain and a 2D layer structure. Journal of the Chemical Society, Dalton Transactions, , pp. 4457-.