Actinium(III) nitrate
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| ImageFile = Actinium(III) nitrate solid.png
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| ImageCaption = The glass is discolored due to the high radiation of actinium
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| OtherNames = Actinium nitrate
|Section1={{Chembox Identifiers
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| CASNo = 211179-74-7
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| UNII_Ref = {{fdacite|changed|FDA}}
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| PubChem = 129641620
| SMILES = [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Ac]
| StdInChI = 1S/Ac.3NO3/c;3*2-1(3)4/q;3*-1
| StdInChIKey = AEFUOHSKBCUMLM-UHFFFAOYSA-N
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|Section2={{Chembox Properties
| Formula = Ac(NO3)3
| MolarMass = 413.04
| Appearance = White substance
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| Solubility = Soluble}}
|Section3={{Chembox Hazards
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| GHSSignalWord = Warning
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|Section6={{Chembox Related
| OtherCompounds = Thorium(IV) nitrate
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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.{{cite journal |last1=Ferrier |first1=Maryline G. |last2=Stein |first2=Benjamin W. |last3=Batista |first3=Enrique R. |last4=Berg |first4=John M. |last5=Birnbaum |first5=Eva R. |last6=Engle |first6=Jonathan W. |last7=John |first7=Kevin D. |last8=Kozimor |first8=Stosh A. |last9=Lezama Pacheco |first9=Juan S. |last10=Redman |first10=Lindsay N. |title=Synthesis and Characterization of the Actinium Aquo Ion |journal=ACS Central Science |date=22 March 2017 |volume=3 |issue=3 |pages=176–185 |doi=10.1021/acscentsci.6b00356 |pmid=28386595 |issn=2374-7943|pmc=5364452 }}
Synthesis
Actinium nitrate can be obtained by dissolving actinium or actinium hydroxide in nitric acid.
:{{chem2|Ac(OH)3 + 3HNO3 → Ac(NO3)3 + 3H2O}}
Properties
Actinium(III) nitrate decomposes on heating above 600 °C:
:{{chem2|4Ac(NO3)3 → 2Ac2O3 + 12NO2 + 3O2}}
This salt is used as a source of Ac3+ ions to obtain insoluble actinium compounds by precipitation from aqueous solutions.{{cite journal |last1=Salutsky |first1=M. L. |last2=Kirby |first2=H. W. |title=Precipitation of Actinium Oxalate from Homogeneous Solution |journal=Analytical Chemistry |date=1 November 1956 |volume=28 |issue=11 |pages=1780–1782 |doi=10.1021/ac60119a044 |url=https://pubs.acs.org/doi/abs/10.1021/ac60119a044 |access-date=18 August 2021 |issn=0003-2700}}