Stability of gaseous ternary compounds of the systems Eu-X-O: X = IV, V, or VIA group elements

Europia reacts chemically at high temperatures with metals and/or metal oxides of the IV, V, VIA group elements to give rise, under vaporization conditions, to mixed oxide molecules, in addition to the constituent metal oxides. In this paper, the results of more or less extensive investigations on nine Eu-X-O systems are reported and discussed, which led to the identification and stability determination of about 15 gaseous ternary oxide compounds, most of which have the composition EuXO/sub n/ (n = 1-4; X = IV, V, VIA group metal), with n = 3 in the majority of cases studied. The thermochemical properties of these europium-containing, high-temperature species are summarized. Prediction is tentatively made of the stability of not yet studied species