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Discusses a study which determined the crystal structure and magnetic properties of the layered compound Co(HPO[sub3]) H[sub2]O. Formation and refinement of the structure; Description of the structure; Characterization of the magnetic properties of the sample.

Discusses a study which examined the magnetic properties of the ordered bimetallic compound CoCo(NiEDTA)[sub2]4H[sub2]O. Structure of the bimetallic compound; Conditions that influence magnetic behavior; Computational equations for the transfer matrix of the bimetallic compound.

Nanostructured cerium oxides, pure or doped with CaO, prepared from amorphous acetate precursors obtained by the freeze drying method, exhibit high surface areas and are active and selective catalysts for the oxydehydrogenation of ethane (ODE) using CO2as an oxidant. The incorporation of Ca into a solid solution in the ceria framework reduces the activity but improves markedly the selectivity to ethene and the efficiency of CO2. Under reaction conditions, the pure ceria was stable even at 1023 K, while the surface area of the Ca-containing sample decreased markedly. This change was accompanied by a drastic increase in the selectivity to ethene, allowing to obtain yields of ethene up to 22% with 91% selectivity. [ABSTRACT FROM AUTHOR]

Details a study which investigated the magnetic and thermal properties of the ordered bimetallic chain CoNi(EDTA) 6H[sub2]O in very low temperature range. Structure of the bimetallic chain; Analysis of magnetic properties; Information on one-dimensional ferromagnets.