Hydrothermal synthesis and characterization of a manganese (II)-substituted aluminum phosphate Mn3Al6(PO4)12 • 4tren • 11H2O with 12-membered ring channel open framework

A three-dimensional manganese(II)-substituted aluminum phosphate, Mn3Al6(PO4)(12) center dot 4tren center dot 11H(2)O[tren is tris(2-aminoethyl)amine], was synthesized hydrothermally. Its structure was determined by single-crystal X-ray diffraction analysis and further characterized by X-ray powder diffraction, ICP, TG analyses and magnetic susceptibility measurements. It crystallizes in the cubicsystem, space group I-43m(No. 217) with a=1.683 51(4)nm, V=4.771 4(2) nm(3), Z=2, R-1=0.043 9 and wR(2)= 0.132 4[I > 2 sigma(I)]. The open framework built up from strict alternation of TO4/AlO4 and PO4 tetrahedra through corner-sharing vertex oxygen atoms. It contains 12-membered ring channels. The Mn atoms of the framework are bivalence proved by magnetic susceptibility measurements.