Chemistry: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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PubChem CID
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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). | |
 verify (what is   ?)
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| Infobox references | |
Tracking categories (test):
Actinium(III) oxide is a chemical compound containing the rare radioactive element actinium. It has the 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
- 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
- ↑ 1.0 1.1 Christine Guéneau; Alain Chartier; Paul Fossati; Laurent Van Brutzel; Philippe Martin (2020). "Thermodynamic and Thermophysical Properties of the Actinide Oxides" (in en). Comprehensive Nuclear Materials 2nd Ed. 7: 111–154. doi:10.1016/B978-0-12-803581-8.11786-2. ISBN 9780081028667.
- ↑ 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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