Issue 6, 2013

Na2AgF4: 1D antiferromagnet with unusually short Ag2+⋯Ag2+ separation

Abstract

Disodium tetrafluoroargentate(II) (Na2AgF4) has been synthesized by the thermal decomposition of NaAg(III)F4 in the presence of NaF. This novel synthetic pathway yielded a high-purity product which enabled determination of the crystal structure and magnetic properties of this compound. The crystal structure of Na2AgF4 contains infinite [AgF2+4/2]2− chains, in analogy to β-K2AgF4, but with a different packing of chains. The unusually short Ag2+⋯Ag2+ contact of 3.342 Å within the chain is the shortest Ag2+⋯Ag2+ distance among all structurally characterized compounds of divalent silver. This structural feature is responsible for the 1D antiferromagnetic properties of Na2AgF4 as determined from powder magnetic susceptibility measurements. These findings are rationalized with the aid of calculations of magnetic coupling constants within the framework of the Density Functional Theory including on-site Coulomb repulsion (DFT+U).

Graphical abstract: Na2AgF4: 1D antiferromagnet with unusually short Ag2+⋯Ag2+ separation

Supplementary files

Article information

Article type
Paper
Submitted
26 Sep 2012
Accepted
07 Nov 2012
First published
08 Nov 2012

Dalton Trans., 2013,42, 2167-2173

Na2AgF4: 1D antiferromagnet with unusually short Ag2+⋯Ag2+ separation

D. Kurzydłowski, Z. Mazej and W. Grochala, Dalton Trans., 2013, 42, 2167 DOI: 10.1039/C2DT32257A

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