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

Actinium(III) hydroxide
Names
Other names
Actinium hydroxide
Identifiers
3D model (JSmol)
  • InChI=1S/Ac.3H2O/h;3*1H2/q+3;;;/p-3
    Key: FXNGTWJQBRAZDM-UHFFFAOYSA-K
  • [Ac+3].[OH-].[OH-].[OH-]
Properties
Ac(OH)3
Appearance white solid
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).

Preparation

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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

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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

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  1. ^ 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)