When treated with a mixture of gaseous ammonia and water vapor at 500°C, it turns into actinium oxybromide.2
"Actinium tribromide". WebElements. Retrieved 15 April 2021. https://www.webelements.com/compounds/actinium/actinium_tribromide.html ↩
the University of Michigan (1954). Seaborg, Glenn (ed.). The Actinide Elements. McGraw-Hill. p. 870. ISBN 9780598942548. {{cite book}}: ISBN / Date incompatibility (help) 9780598942548 ↩