Actinium(III) hydroxide

Actinium(III) hydroxide
Names
	Other names Actinium hydroxide
Identifiers
CAS Number	12249-30-8 ;
3D model (JSmol)	Interactive image;
	InChI InChI=1S/Ac.3H2O/h;3*1H2/q+3;;;/p-3 Key: FXNGTWJQBRAZDM-UHFFFAOYSA-K;
	SMILES [Ac+3].[OH-].[OH-].[OH-];
Properties
Chemical formula	Ac(OH)3
Appearance	white solid
Solubility in water	0.021 in water (20 °C)
Related compounds
Other anions	actinium(III) oxide
Other cations	scandium(III) hydroxide; yttrium(III) hydroxide; lanthanum(III) hydroxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Actinium(III) hydroxide is a white radioactive solid with the chemical formula of Ac(OH)₃.

Preparation

Actinium(III) hydroxide may be formed from soluble actinium salts and alkalis or ammonia water, and the resulting gel is precipitated as the product:^[1]

Ac³⁺ + 3 OH⁻ → Ac(OH)₃↓

Its solubility is slightly greater than that of lanthanum hydroxide, but it is still insoluble in water.

Chemical properties

Actinium(III) hydroxide is an alkaline hydroxide, it can react with acids to obtain actinium salts:^[1]

Ac(OH)₃ + 3 HNO₃ → Ac(NO₃)₃ + 3 H₂O

References

^ ^a ^b Tang, Renhuan; Liu, Yuanfang; Zhang, Qinglian; Zhang, Zhiyao. Series of Inorganic Chemistry. Volume 10. Actinides, Transactinides. 4.4 Actinium compounds. pp 75. ISBN 978-7-03-030572-5 (in Chinese)

[wj-1] Tang, Renhuan; Liu, Yuanfang; Zhang, Qinglian; Zhang, Zhiyao. Series of Inorganic Chemistry. Volume 10. Actinides, Transactinides. 4.4 Actinium compounds. pp 75. ISBN 978-7-03-030572-5 (in Chinese)

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