Syntheses and structures of ammonium transition-metal dialuminium tris-(phosphate) dihydrates (NH4) M Al4(PO4)3·2H2O (M = Mn and Ni)

Acta Crystallogr E Crystallogr Commun. 2023 Jan 26;79(Pt 2):116-119. doi: 10.1107/S2056989023000555. eCollection 2023 Jan 1.

Abstract

The structures of ammonium manganese(II) dialuminium tris-(phosphate) dihydrate, (NH4)MnAl2(PO4)3·2H2O, and ammonium nickel(II) dialuminium tris-(phosphate) dihydrate, (NH4)NiAl2(PO4)3·2H2O, were determined using single-crystal diffraction data. The structures of title compounds are isotypic to cobalt aluminophosphate, (NH4)CoAl2(PO4)3·2H2O (LMU-3) [Panz et al. (1998 ▸). Inorg. Chim. Acta, 269, 73-82], in which a three-dimensional network of vertex-sharing AlO5 and PO4 moieties delineate twelve-membered channels in which ammonium, NH4 +, and transition-metal cations (M = Mn2+ and Ni2+) reside as charge compensators for the anionic [Al2(PO4)3]3- aluminophosphate framework. In both structures, the N atom of the ammonium cation, the transition-metal ion and one of the P atoms lie on crystallographic twofold axes.

Keywords: aluminophosphate; crystal structure; single-crystal diffraction.

Grants and funding

This work was supported financially by Grant-in-Aid for Scientific Research on Innovative Areas No. 18H05456.