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Cobalt Ions in Non-Metallic-Structures

Ascher, E.
Janner, A.
Published in Journées Internationales des Applications du Cobalt. Liège (Belgique) - 9-11 juin 1964 - . 1964
Abstract An investigation was made to det. whether and under which circumstances Co could play a role analogous to that of Fe in ferrites. In the theoretical part, certain "rules" were derived to make a comparison on the basis of a close-packed anionic structure, and to approximate the Curie (or Neel) temp. In the exptl. part, no anhyd. compds. of the Co(II) oxyfluorides could be found. Several Co(II) hydroxyfluorides and a fluoride hydrate were obtained for the first time. Attempts to replace Fe+++ by Co++ and other high-valence cations in KFe11O17 and related β-Al2O3 compds. were unsuccessful. A large proportion of Ga+++ could be introduced in KFe11O17, producing a magnetic behavior which possibly indicates a change in coupling between the spinel blocks of the structure.
Keywords Curie pointNeel point (of cobalt compds., of ferrate type)Magnetic properties (of potassium ferrate (KFe11O17)contg. Ga)Potassium ferrate(III)
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ASCHER, E., SCHMID, Hans, JANNER, A. Cobalt Ions in Non-Metallic-Structures. In: Journées Internationales des Applications du Cobalt. Liège (Belgique). [s.l.] : [s.n.], 1964.

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