Synthesis, Crystal Structure, and Properties of Mn(PO<sub>3</sub>F)(H<sub>2</sub>O)<sub>2</sub>

Author(s)
Matthias Weil, Enrique J. Baran, Reinhard Karl Kremer, Eugen Libowitzky
Abstract

Single crystals of manganese(II) fluorophosphate dihydrate, Mn(PO

3F)(H

2O)

2, were grown in a metathesis reaction from aqueous solutions of MnCl

2 and (NH

4)

2(PO

3F). The crystal structure [P1¯, Z = 2, a = 5.5280(7), b = 5.6357(7), c = 8.2570(10) Å, α = 81.279(2),β = 75.156(2), γ = 71.722(2)° , 1345 structure factors, 86 parameter, R[F

2> 2σ(F

2)] = 0.0322, wR(F

2all) = 0.0771] consists of [MnO

4(H

2O)

2] octahedra that share a common edge to form isolated double octahedra of the type [Mn

2O

2/2O

4/1(H2O)4/1]. Each double octahedron is bridged by the oxygen atoms of six (PO

3F) tetrahedra to six neighboring double octahedra into a layered arrangement parallel to (001). Adjacent layers are held together through weak O-H•••O hydrogen bonds, and no significant hydrogen bonding interactions of the type O-H•••F are observed. Vibrational spectra are discussed in terms of a site-symmetry approximation for the (PO

3F)

2-anion. The thermal decomposition of Mn(PO

3F)(H

2O)

2 starts above 130 ° C. In a multi-stage mechanism the end-product Mn

2P

2O

7 is formed at temperatures above 500 ° C. Magnetic measurements suggest an antiferromagnetic ordering of Mn(PO

3F)(H

2O)

2at 3.4 K.

Organisation(s)
Department of Mineralogy and Crystallography
External organisation(s)
Technische Universität Wien, Universidad Nacional de La Plata, Max-Planck-Institut für Festkörperforschung
Journal
Zeitschrift für Anorganische und Allgemeine Chemie
Volume
641
Pages
184-191
No. of pages
8
ISSN
0044-2313
DOI
https://doi.org/10.1002/zaac.201400587
Publication date
01-2015
Peer reviewed
Yes
Austrian Fields of Science 2012
104011 Materials chemistry, 105113 Crystallography
Keywords
ASJC Scopus subject areas
Inorganic Chemistry
Portal url
https://ucrisportal.univie.ac.at/en/publications/5538a8cb-3d17-443a-abe4-5f8836c8ce76