Actinium(III) oxide

Actinium(III) oxide
Names


IUPAC name Actinium(III) oxide
Systematic IUPAC name Actinium(3+) oxide
Other names Actinium sesquioxide
Identifiers
CAS Number	12002-61-8^N
3D model (JSmol)	Interactive image
ECHA InfoCard	100.031.275
EC Number	234-417-6
PubChem CID	21946271
CompTox Dashboard (EPA)	DTXSID601029728
InChI InChI=1S/2Ac.3O/q;;3*-2^Y[pubchem] Key: MAPOZTWVBAGEOP-UHFFFAOYSA-N^Y[pubchem]
SMILES [O--].[O--].[O--].[Ac+3].[Ac+3]
Properties
Chemical formula	Ac₂O₃
Molar mass	502.053 g/mol
Appearance	white
Melting point	2,327 °C (4,221 °F; 2,600 K)^[1]
Structure
Crystal structure	Trigonal, hP5
Space group	P3m1, No. 164
Lattice constant	a = 408 pm, c = 630 pm^[1]
Related compounds
Other cations	Lanthanum(III) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references

Chemical compound

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

^ ^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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Mixed oxidation states

Antimony tetroxide (Sb₂O₄)
Boron suboxide (B₁₂O₂)
Carbon suboxide (C₃O₂)
Chlorine perchlorate (Cl₂O₄)
Chloryl perchlorate (Cl₂O₆)
Cobalt(II,III) oxide (Co₃O₄)
Dichlorine pentoxide (Cl₂O₅)
Iron(II,III) oxide (Fe₃O₄)
Lead(II,IV) oxide (Pb₃O₄)
Manganese(II,III) oxide (Mn₃O₄)
Mellitic anhydride (C₁₂O₉)
Praseodymium(III,IV) oxide (Pr₆O₁₁)
Silver(I,III) oxide (Ag₂O₂)
Terbium(III,IV) oxide (Tb₄O₇)
Tribromine octoxide (Br₃O₈)
Triuranium octoxide (U₃O₈)

+1 oxidation state

Aluminium(I) oxide (Al₂O)
Copper(I) oxide (Cu₂O)
Caesium monoxide (Cs₂O)
Dicarbon monoxide (C₂O)
Dichlorine monoxide (Cl₂O)
Gallium(I) oxide (Ga₂O)
Iodine(I) oxide (I₂O)
Lithium oxide (Li₂O)
Mercury(I) oxide (Hg₂O)
Nitrous oxide (N₂O)
Potassium oxide (K₂O)
Rubidium oxide (Rb₂O)
Silver oxide (Ag₂O)
Thallium(I) oxide (Tl₂O)
Sodium oxide (Na₂O)
Water (hydrogen oxide) (H₂O)

+2 oxidation state

+3 oxidation state

Actinium(III) oxide (Ac₂O₃)
Aluminium oxide (Al₂O₃)
Americium(III) oxide (Am₂O₃)
Antimony trioxide (Sb₂O₃)
Arsenic trioxide (As₂O₃)
Berkelium(III) oxide (Bk₂O₃)
Bismuth(III) oxide (Bi₂O₃)
Boron trioxide (B₂O₃)
Caesium sesquioxide (Cs₂O₃)
Californium(III) oxide (Cf₂O₃)
Cerium(III) oxide (Ce₂O₃)
Chromium(III) oxide (Cr₂O₃)
Cobalt(III) oxide (Co₂O₃)
Dinitrogen trioxide (N₂O₃)
Dysprosium(III) oxide (Dy₂O₃)
Einsteinium(III) oxide (Es₂O₃)
Erbium(III) oxide (Er₂O₃)
Europium(III) oxide (Eu₂O₃)
Gadolinium(III) oxide (Gd₂O₃)
Gallium(III) oxide (Ga₂O₃)
Gold(III) oxide (Au₂O₃)
Holmium(III) oxide (Ho₂O₃)
Indium(III) oxide (In₂O₃)
Iron(III) oxide (Fe₂O₃)
Lanthanum oxide (La₂O₃)
Lutetium(III) oxide (Lu₂O₃)
Manganese(III) oxide (Mn₂O₃)
Neodymium(III) oxide (Nd₂O₃)
Nickel(III) oxide (Ni₂O₃)
Phosphorus trioxide (P₄O₆)
Praseodymium(III) oxide (Pr₂O₃)
Promethium(III) oxide (Pm₂O₃)
Rhodium(III) oxide (Rh₂O₃)
Samarium(III) oxide (Sm₂O₃)
Scandium oxide (Sc₂O₃)
Terbium(III) oxide (Tb₂O₃)
Thallium(III) oxide (Tl₂O₃)
Thulium(III) oxide (Tm₂O₃)
Titanium(III) oxide (Ti₂O₃)
Tungsten(III) oxide (W₂O₃)
Vanadium(III) oxide (V₂O₃)
Ytterbium(III) oxide (Yb₂O₃)
Yttrium(III) oxide (Y₂O₃)

+4 oxidation state

Americium dioxide (AmO₂)
Berkelium(IV) oxide (BkO₂)
Bromine dioxide (BrO₂)
Californium dioxide (CfO₂)
Carbon dioxide (CO₂)
Carbon trioxide (CO₃)
Cerium(IV) oxide (CeO₂)
Chlorine dioxide (ClO₂)
Chromium(IV) oxide (CrO₂)
Curium(IV) oxide (CmO₂)
Dinitrogen tetroxide (N₂O₄)
Germanium dioxide (GeO₂)
Iodine dioxide (IO₂)
Iridium dioxide (IrO₂)
Hafnium(IV) oxide (HfO₂)
Lead dioxide (PbO₂)
Manganese dioxide (MnO₂)
Neptunium(IV) oxide (NpO₂)
Nitrogen dioxide (NO₂)
Osmium dioxide (OsO₂)
Platinum dioxide (PtO₂)
Plutonium(IV) oxide (PuO₂)
Polonium dioxide (PoO₂)
Praseodymium(IV) oxide (PrO₂)
Protactinium(IV) oxide (PaO₂)
Rhodium(IV) oxide (RhO₂)
Ruthenium(IV) oxide (RuO₂)
Selenium dioxide (SeO₂)
Silicon dioxide (SiO₂)
Sulfur dioxide (SO₂)
Technetium(IV) oxide (TcO₂)
Tellurium dioxide (TeO₂)
Terbium(IV) oxide (TbO₂)
Thorium dioxide (ThO₂)
Tin dioxide (SnO₂)
Titanium dioxide (TiO₂)
Tungsten(IV) oxide (WO₂)
Uranium dioxide (UO₂)
Vanadium(IV) oxide (VO₂)
Zirconium dioxide (ZrO₂)

+5 oxidation state

Antimony pentoxide (Sb₂O₅)
Arsenic pentoxide (As₂O₅)
Bismuth pentoxide (Bi₂O₅)
Dinitrogen pentoxide (N₂O₅)
Niobium pentoxide (Nb₂O₅)
Phosphorus pentoxide (P₂O₅)
Protactinium(V) oxide (Pa₂O₅)
Tantalum pentoxide (Ta₂O₅)
Vanadium(V) oxide (V₂O₅)

+6 oxidation state

+7 oxidation state

Dichlorine heptoxide (Cl₂O₇)
Manganese heptoxide (Mn₂O₇)
Rhenium(VII) oxide (Re₂O₇)
Technetium(VII) oxide (Tc₂O₇)

+8 oxidation state

Related

Oxides are sorted by oxidation state. Category:Oxides

This inorganic compound–related article is a stub. You can help Wikipedia by expanding it.

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