Thermal behaviour of co-precipitated mixtures of chromium(III) and uranium(VI)

Abstract In the CrUO system, besides the phases reported earlier, a triuranate CrU 3 O 10- x ( x ∼ 0.3) could be identified. It is unstable above 70o°C and decomposes to a mixture of CrUO 4 and U 3 O 8 . Under reducing atmospheres up to 1600°C, the uranium—chromium—oxygen system gives a mixture of Cr 2 O 3 and UO 2 . No new phase could be identified. The compound CrUO 4 is unstable under reducing conditions and decomposes to a mixture of Cr 2 O 3 and UO 2 .