The Binary Oxide System TeO2MoO3

Phase analysis of the mixed oxide system TeO2MoO3 by means of x‐ray diffraction and optical microscopy indicates the formation of a new phase, α‐Te2MoO7, stable at room temperature. Below 500°C mixtures of crystalline products are obtained or complete devitrification can easily be induced in the system TeO2MoO3. Above this temperature, tendency to glass formation is observed under the conditions employed, due to the liquidus temperature effect. Quenching of a melt of Te2MoO7 yields a dark yellow glass, α‐Te2MoO7. X‐ray and density measurements were used to explore the range of stoichiometry and exclude formation of solid solutions in the system; no apparent relationship exists between the crystal structures of the component oxides and the binary compound.