Abstract

A method has been developed for collecting vapors over solid or over mixtures of and in a specially designed titanium pipette at elevated temperatures. The reaction of titanium tetra‐ and trichloride with Ti metal could not be prevented on cooling, but the analytical total content of chlorine could be used to determine the apparent total concentration of titanium in the vapor phase. The study indicated strong positive deviations from Raoult's Law for liquid solutions and limited solubility of in liquid in the range from 720° to 800°C. This was confirmed by thermal analyses of mixtures. The system is of the peritectic type. The peritectic point lies at about and at 716°C. The melting point of is 1025°C. Salt mixtures in equilibrium with Ti metal contain only , and no measurable quantities of or .

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