Low-temperature phase formation in the BаF2-CeF3 system

• BaF2-CeF3 system was studied by co-precipitation from aqueous nitrate solutions.
• Fluorite-type Ba1-xCexF2+x (х = 0.32–0.58) was precipitated by HF.
• Tysonite-type Ce1-yBayF3-y (y = 0–0.20) was precipitated by HF and NH4F.
• Composition of the precipitates depends on the order of mixing of the reagents.

Phase formation in the BaF2-CeF3 system has been studied in the aqueous nitrate media by co-precipitation technique with the use of HF and NH4F as fluorinating agents. Formation and properties of fluorite-type Ba1-xCexF2+x (х = 0.32–0.58) and tysonite-type Ce1-yBayF3-y (y = 0–0.20) solid solutions are described in the present paper.

Phase composition in the BaF2-CeF3 system at high temperature area (upper panel, equilibrium state) and after low temperature synthesis (low panel, non-equilibrium state).Figure optionsDownload as PowerPoint slide