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Ni 3 Cl 2+ x (OH) 4– x ·2H 2 O: Structural, Thermal, Spectral, and Magnetic Properties in Dependence of the Chloride Content
Author(s) -
Bette Sebastian,
Dinnebier Robert E.,
Kremer Reinhard K.,
Freyer Daniela
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201600074
Subject(s) - chemistry , antiferromagnetism , crystallography , magnetic susceptibility , ferromagnetism , nickel , non blocking i/o , crystal structure , octahedron , condensed matter physics , biochemistry , physics , organic chemistry , catalysis
The previously unknown nickel chloride hydroxide phases Ni 3 Cl 2+ x (OH) 4– x · 2H 2 O ( x = 0.26, 0.48, 0.82) have been synthesized in concentrated aqueous NiCl 2 solutions and investigated in detail. Crystal structure determination from X‐ray powder diffraction data revealed triple chains of distorted, edge‐linked NiO 6 and NiO 3 (O/Cl) 3 octahedra as the main building blocks. The chains exhibit a layer‐like configuration and therefore great structural similarity to nickel‐layered hydroxy halides (Cl, Br, I) and β‐Ni(OH) 2 . Increasing chloride content in Ni 3 Cl 2+ x (OH) 4– x · 2H 2 O leads to a reduction of the space group symmetry from C 2/ m (12) for x = 0.26 and 0.48 to P $\bar {1}$ (2) for x = 0.82 and to distinct shifts in their thermal, spectral, and magnetic properties. Each solid exhibits a maximum magnetic susceptibility in the range 5.9–9.7 K, which indicates antiferromagnetic ordering. Positive Curie–Weiss temperatures, θ , were found, which points to predominantly ferromagnetic spin‐exchange interactions. In addition, broad maxima of the magnetic susceptibility evidence a low‐dimensional magnetic character as the most prominent feature of the magnetic properties of the investigated phases.