Showing papers in "Acta Chemica Scandinavica in 1959"

On the defect structure of rutile

Abstract: : From the point of view of its importance to the understanding of the oxidation behaviour of titanium and titanium alloys, a theoretical reinvestigation is made of the defect structure of rutile with special emphasis on what is to be expected from the ideal rutile structure itself. A discussion is moreover given of previous experimental results on the subject, and it is concluded that most of the available data are possibly best explained by assuming the defect structure to be a combination of a non-stoichiometric and a stoichiometric one, both involving titanium interstitial ions. (Author)

Solvent extraction of metal chelates. i. application of a titration procedure to the study of the extraction of metal chelates

Abstract: A two-phase titration procedure for the study of metal chelate equilibria is presented. Equations expressing the relationship between the apparent mean complexity constant in the two-phase system, the mean complexity constant in a water phase, and the distribution coefficients of the uncharged species are derived. The pH-value of 10% extraction of a metal ion is deterinined with good approxiination by this method. The error introduced by the simplified theoretical treatment is discussed and the predictions are confirmed by independent distribution experiments, employing lanthanum-140 as tracer. (auth)