The rather complex mixed oxide system TeO2Ta2O5 has been studied by means of x‐ray powder diffraction, at room temperature, using samples prepared in the interval of 500 to 900°C. Four whitish coloured stable mixed oxide phases have been found, corresponding to the formulas 3TeO2 · Ta2O5, 7TeO2 · 3Ta2O5 and 2TeO2 · Ta2O5 ( in a low and high temperature form). The latter compound is not isostructural with 2TeO2 V2O5. Approximate stability ranges are: up to 850°C, 3TeO2 · Ta2O5; 700–900°C, 7TeO2 · 3Ta2O5; 850°C and higher, 2TeO2 · Ta2O5 (H); 700–800°C, 2TeO2 Ta2O5 (L).
No takes yet. Share an insight, caveat, or question.
G. Petrini (1980) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: