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Acta Cryst. (2002). E58, i44-i48 [ doi:10.1107/S160053680200870X ]
Abstract: Ammonium di(zinc, gallium) bis(phosphate), (NH4)(Zn,Ga)2(PO4)2, has a zeolite-like open-framework structure. It contains channels of four- and eight-membered rings of alternating tetrahedra of (Zn,Ga)O4 (Zn:Ga ![[asymptotically equal to]](/logos/entities/sime_rmgif.gif)
1:1) and PO4, in which the tetrahedra are connected via corners. The NH4+ cations are located in the channels and provide weak hydrogen bonds to the framework O atoms. The average (Zn,Ga)-O bond lengths of the two non-equivalent (Zn,Ga)O4 tetrahedra are 1.863 and 1.870 Å. All atoms are in general positions. The compound is isostructural with K(CoII,Al)2(PO4)2 and [(NH4)x(NH3)0.5-x]CoxAl1-xPO4 (x = 0.38). Single-crystal Raman and IR spectra are discussed.
Online 24 May 2002
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