The first reported syntheses and characterisation of alkali metal trifluoronickelate(II) monohydrates, MNiF3. H2O (M = NH4, Na or K)

Chaudhuri, Mihir K. ; Ghosh, Soumitra K. ; Hiese, Zavei (1985) The first reported syntheses and characterisation of alkali metal trifluoronickelate(II) monohydrates, MNiF3. H2O (M = NH4, Na or K) Transition Metal Chemistry, 10 (9). pp. 321-322. ISSN 0340-4285

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Official URL: http://www.springerlink.com/content/qj7p1005050534...

Related URL: http://dx.doi.org/10.1007/BF01036389

Abstract

Ni(acac)2 . (H2O)2 (1 mol) and alkali metal fluorides (4 mols), MF (M=NH4, Na or K), react with an excess of 40% HF on a steam-bath. The product upon treatment with water gives light green crystalline alkali metal trifluoronickelate(II) monohydrate, MNiF3 . H2O in a high yield. Chemical analyses, pyrolysis at 120 °C, i.r. spectroscopic, and cryomagnetic (300-80 K) data have been used to characterise, and establish the identity of the compounds. While NH4NiF3 . H2O behaves as a normal octahedral nickel(II) compound, NaNiF3 . H2O is ferromagnetic with Curie point 145 K, KNiF3 . H2O behaves antiferromagnetically; its Neel point is 230 K.

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