Anhydrous cerium bromide (CeBr3) and cerium doped lanthanum bromide (Ce+3-LaBr3) were obtained by the
dehydration of hydrates synthesized by a direct acidification process. The dehydration process involves heating in
vacuum through three phase changes - hydrate, amorphous, and crystalline LaBr3. Incomplete removal of the
bound water leads to the formation of oxybromides and the partial reduction of the lanthanum at high temperatures.
It was found that upon the completion of dehydration (< 200 °C) a complete solid solution can be formed between
LaBr3 and CeBr3. These two compounds form a simple binary phase diagram. Challenges associated with the
dehydration process are discussed.
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