Actinium(III) nitrate

The glass is discolored due to the high radiation of actinium
Names
Other names Actinium nitrate
Identifiers
CAS Number	211179-74-7 Y
3D model (JSmol)	Interactive image
PubChem CID	129641620
InChI InChI=1S/Ac.3NO3/c;3*2-1(3)4/q;3*-1 Key: AEFUOHSKBCUMLM-UHFFFAOYSA-N
SMILES [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Ac]
Properties
Chemical formula	Ac(NO3)3
Molar mass	413.04
Appearance	White substance
Solubility in water	Soluble
Hazards
GHS labelling:
Signal word	Warning
Related compounds
Related compounds	Thorium(IV) nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Actinium(III) nitrate is an inorganic compound, actinium salt of nitric acid with the chemical formula Ac(NO₃)₃. The compound looks like white substance, readily soluble in water.^[1]

Synthesis

Actinium nitrate can be obtained by dissolving actinium or actinium hydroxide in nitric acid.

${\displaystyle {\mathsf {Ac(OH)_{3}+3HNO_{3}\ \xrightarrow {} \ Ac(NO_{3})_{3}+3H_{2}O))}$

Properties

Actinium(III) nitrate decomposes on heating above 600 °C:

${\displaystyle {\mathsf {4Ac(NO_{3})_{3}=2Ac_{2}O_{3}+12NO_{2}+3O_{2))))$

This salt is used as a source of Ac³⁺ ions to obtain insoluble actinium compounds by precipitation from aqueous solutions.^[2]