Synthesis and crystal structure of KMn2O(PO4)(HPO4)

Philip Lightfoot*, Anthony K. Cheetham, Arthur W. Sleight

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

KMn2O(PO4)(HPO4) crystallizes in the monoclinic space group P21 m, with a = 6.226(1), b = 6.890(2), c = 8.809(1) Å, and β = 107.67(1)°. For Z = 2 the calculated density is 3.282 g cm-3. Crystals were obtained hydrothermally, from a mixture of Mn3O4, KH2PO4, and H2O, by slow cooling from 673 K under an external nitrogen pressure of 3 kbar. The structure was solved by Patterson and Fourier methods and refined to final agreement factors R = 0.024, Rw = 0.027. The structure is composed of zigzag chains of edge sharing MnO6 octahedra linked together by PO4 tetrahedra to form sheets parallel to the bc plane. These sheets are linked to adjacent ones via additional PO4 tetrahedra and hydrogen bonds. The resulting framework encloses channels running parallel to the [011] direction in which the potassium resides.

Original languageEnglish
Pages (from-to)325-329
Number of pages5
JournalJournal of Solid State Chemistry
Volume73
Issue number2
DOIs
Publication statusPublished - 1 Jan 1988

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