Actinium(III) bromide

Actinium(III) bromide[1]

Names
Other names Actinium tribromide
Identifiers
CAS Number	33689-81-5^Y[EPA]
3D model (JSmol)	Interactive image
ChemSpider	23620756
PubChem CID	57348990
CompTox Dashboard (EPA)	DTXSID40721762
InChI InChI=1S/Ac.3BrH/h;3*1H/p-3 Key: KATYVAFQSWUUQL-UHFFFAOYSA-K
SMILES [Br-].[Br-].[Br-].[Ac]
Properties
Chemical formula	AcBr3
Molar mass	466.74 g/mol
Appearance	White crystalline solid
Density	5.85 g/cm^3
Melting point	827 °C (1,521 °F; 1,100 K)
Boiling point	1,597 °C (2,907 °F; 1,870 K)
Solubility in water	soluble
Structure
Crystal structure	hexagonal, hP8[2]
Related compounds
Other anions	Actinium(III) chloride
Other cations	Lanthanum(III) bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Actinium(III) bromide is a radioactive white crystalline solid that is a salt of actinium. It is prepared by reacting actinium(III) oxide with aluminium bromide at 750 °C.[1]

Reactions

When treated with a mixture of gaseous ammonia and water vapor at 500°C, it turns into actinium oxybromide.[3]

References

1. "Actinium tribromide". WebElements. Retrieved 15 April 2021.
2. Zachariasen, W. H. (1948). "Crystal chemical studies of the 5f-series of elements. I. New structure types". Acta Crystallographica. 1 (5): 265–268. Bibcode:1948AcCry...1..265Z. doi:10.1107/S0365110X48000703.
3. the University of Michigan (1954). Seaborg, Glenn (ed.). The Actinide Elements. McGraw-Hill. p. 870. ISBN 9780598942548.