Synthesis and structure of a novel layered phosphate NH4Mn2O(PO4)(HPO4) · H2O

P. Lightfoot*, A. K. Cheetham

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


A novel layered phosphate, NH4Mn2O(PO4)(HPO4) · H2O, has been synthesized hydrothermally at 220°C under autogeneous water vapor pressure. The compound crystallizes in the orthorhombic space groupP212121, witha = 6.879(2), b = 7.741(2), andc = 16.244(3)Å. The structure was solved by Patterson and Fourier methods and refined to final agreement factorsR = 0.026, Rw = 0.028. Dominating the structure are zigzag chains of edge-sharing MnO6 octahedra running parallel toa, which are interconnected via bridging PO4 groups to form continuous sheets lying in theab plane. Adjacent sheets in thec direction are separated by NH+ 4 ions, and held together via H-bonding. The relationship of the structure to that of the more compact KMn2O(PO4)(HPO4) is discussed.

Original languageEnglish
Pages (from-to)17-22
Number of pages6
JournalJournal of Solid State Chemistry
Issue number1
Publication statusPublished - 1 Jan 1989


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