Synthesis and structure of a new open-framework zinc phosphate: [Zn3(PO4)2(HPO4)0.5]−0.5[(NH3(CH2)2(NH3)]2+H2O

A new open-framework zinc phosphate, [Zn3(PO4)2(HPO4)0.5]−[0.5(NH3(CH2)2(NH3)]2+H2O, having Zn–O–Zn linkages was synthesized by hydrothermal technique. The structure consists of a network of ZnO4 and PO4 tetrahedra in which the vertices are shared. Water molecules are present in a 6-membered channel and the protonated ethylenediamine molecule is in the middle of a 8-membered channel, creating alternating hydrophobic and hydrophilic channels.