Actinium(III) oxide
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| Names | |
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| IUPAC name
Actinium(III) oxide
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| Systematic IUPAC name
Actinium(3+) oxide | |
| Other names
Actinium sesquioxide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.031.275 |
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Ac2O3 | |
| Molar mass | 502.053 g/mol |
| Appearance | white |
| Melting point | 2,327 °C (4,221 °F; 2,600 K)[1] |
| Structure | |
| Trigonal, hP5 | |
| P3m1, No. 164 | |
a = 408 pm, c = 630 pm[1]
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| Related compounds | |
Other cations
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Lanthanum(III) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Actinium(III) oxide is a chemical compound containing the rare radioactive element actinium. It has the molecular formula Ac2O3. It is similar to its corresponding lanthanum compound, lanthanum(III) oxide, and contains actinium in the oxidation state +3.[2][3] Actinium oxide is not to be confused with Ac2O (acetic anhydride), where Ac is an abbreviation for acetyl instead of the symbol of the element actinium.
Reactions
[edit]- Ac2O3 + 6HF → 2AcF3 + 3H2O
- Ac2O3 + 6HCl → 2AcCl3 + 3H2O
- 4Ac(NO3)3 → 2Ac2O3 + 12NO2 + 3O2
- 4Ac + 3O2 → 2Ac2O3
- Ac2O3 + 2AlBr3 → 2AcBr3 + Al2O3
- 2Ac(OH)3 → Ac2O3 + 3H2O
- Ac2(C2O4)3 → Ac2O3 + 3CO2 + 3CO
- Ac2O3 + 3H2S → Ac2S3 + 3H2O
References
[edit]- ^ a b Christine Guéneau; Alain Chartier; Paul Fossati; Laurent Van Brutzel; Philippe Martin (2020). "Thermodynamic and Thermophysical Properties of the Actinide Oxides". Comprehensive Nuclear Materials 2nd Ed. 7: 111–154. doi:10.1016/B978-0-12-803581-8.11786-2. ISBN 9780081028667. S2CID 261051636.
- ^ Actinium, Great Soviet Encyclopedia (in Russian)
- ^ Sherman, Fried; Hagemann, French; Zachariasen, W. H. (1950). "The Preparation and Identification of Some Pure Actinium Compounds". Journal of the American Chemical Society. 72 (2): 771–775. doi:10.1021/ja01158a034.
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