Actinium (III) bromide

Crystal structure
__  Ac 3+      __  Br -
Crystal system	hexagonal
Space group	P 6 3 / m (No. 176)
Lattice parameters	a = 806 pm c = 468 pm
General
Surname	Actinium (III) bromide
other names	Actinium tribromide
Ratio formula	AcBr 3
Brief description	white solid
External identifiers / databases
CAS number 33689-81-5 Wikidata Q2926024
properties
Molar mass	466.76 g mol −1
Physical state	firmly
density	5.85 g cm −3
Sublimation point	800 ° C
solubility	soluble in water
Hazard and safety information
Radioactive
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

(III) bromide Actinium is a chemical compound of the actinium from the group of bromides .

Extraction and presentation

Actinium (III) bromide can be obtained by reacting actinium (III) oxide with aluminum bromide at 750 ° C.

${\displaystyle \mathrm {Ac_{2}O_{3}+2\ AlBr_{3}\longrightarrow 2\ AcBr_{3}+Al_{2}O_{3}} }$

properties

Actinium (III) bromide is a white crystalline solid. It has a crystal structure of the uranium (III) chloride type with the space group P 6 ₃ / m (space group no. 176) and the lattice parameters a = 806 pm, c = 468 pm.

safety instructions

Classifications according to the GHS regulation are not available because they only include chemical hazard, which plays a completely subordinate role compared to the hazards based on radioactivity . The latter also only applies if the amount of substance involved is relevant.

Individual evidence

1. ↑ ^{a b c d} Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1126.
2. ^ ^{A b c} Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, pp. 1 ( limited preview in Google Book search).
3. ↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.