Crystal structure and magnetic properties of Na{sub 2}Ni{sup II}(HPO{sub 3}){sub 2}

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.09.010· OSTI ID:21494120

Maalej, Wassim ^[1]; Vilminot, Serge ^[1]; Elaoud, Zakaria; Mhiri, Tahar ^[2]; Kurmoo, Mohamedally ^[3]

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1. Departement de Chimie des Materiaux Inorganiques, IPCMS, UMR CNRS-UdS 7504, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2 (France)
2. Laboratoire de l'Etat Solide, Departement de Chimie, Faculte des Sciences de Sfax, BP 802, Route de Soukra, 3018 Sfax (Tunisia)
3. Laboratoire DECOMET, CNRS-UMR 7177, Universite de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg Cedex 1 (France)

Na{sub 2}Ni(HPO{sub 3}){sub 2}, obtained as light yellow-green crystals under mild hydrothermal conditions, crystallizes in the orthorhombic Pnma space-group with lattice parameters: a=11.9886(3), b=5.3671(2), c=9.0764(3) A, V=584.01 A{sup 3}, Z=4. The structure consists of zig-zag chains of NiO{sub 6} octahedra bridged by two HPO{sub 3}{sup 2-} and the chains are further connected through HPO{sub 3}{sup 2-} to four nearest chains to form a three dimensional framework, delimiting intersecting tunnels in which the sodium ions are located. The Na cations reside in the irregular Na(1)O{sub 5}, Na-O of 2.276-2.745 A, and Na(2)O{sub 9}, Na-O of 2.342-2.376 A, environments. The presence of the phosphite monoanion has been further confirmed by IR spectroscopy. Due to the 3D framework of Ni connected by O-P-O bridges, the magnetic susceptibility behaves as a paramagnet above 100 K (C=1.49(2) emu K mol{sup -1}, {mu}{sub eff}=3.45 {mu}{sub B}, {Theta}=-39(2) K) and below 6 K, it orders antiferromagnetically as confirmed the sharp drop and the non-Brillouin behavior of the isothermal magnetization at 2 K. - Graphical abstract: The structure of Na{sub 2}Ni(HPO{sub 3}){sub 2} consists of zig-zag chains of NiO{sub 6} octahedra bridged by two HPO{sub 3}{sup 2-} and the chains are further connected through HPO{sub 3}{sup 2-} to four nearest chains to form a three dimensional framework, delimiting intersecting tunnels in which the sodium ions are located. It orders antiferromagnetically at 6 K. Display Omitted

• OSTI ID: 21494120
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 11; Other Information: DOI: 10.1016/j.jssc.2010.09.010; PII: S0022-4596(10)00396-8; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALS
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
LATTICE PARAMETERS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
NICKEL COMPOUNDS
ORTHORHOMBIC LATTICES
PHOSPHORUS COMPOUNDS
SODIUM COMPOUNDS
SODIUM IONS
SPACE GROUPS
ALKALI METAL COMPOUNDS
CHARGED PARTICLES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
IONS
MAGNETIC PROPERTIES
PHYSICAL PROPERTIES
SPECTRA
SYMMETRY GROUPS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS