Neodymium(III) hydroxide

Neodymium(III) hydroxide

Identifiers
CAS Number	16469-17-3^Y
3D model (JSmol)	Interactive image
ChemSpider	77047^Y
ECHA InfoCard	100.036.816
EC Number	240-514-4
PubChem CID	85433
InChI InChI=1S/Nd.3H2O/h;3*1H2/q+3;;;/p-3 Key: ZBAQHMBLDSQPHC-UHFFFAOYSA-K
SMILES [Nd+3].[OH-].[OH-].[OH-]
Properties
Chemical formula	Nd(OH)3
Molar mass	195.266
Appearance	rose solid[1]
Related compounds
Other anions	neodymium(III) oxide
Other cations	praseodymium(III) hydroxide samarium(III) hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Neodymium(III) hydroxide is an insoluble inorganic compound with the chemical formula Nd(OH)₃.^[2][3]

Preparation

Neodymium(III) nitrate and ammonia water will react to produce neodymium(III) hydroxide:^[4]

Nd(NO₃)₃ + 3 NH₃·H₂O → Nd(OH)₃↓ + 3 NH₄NO₃

If the amount of Nd(NO₃)₃ is 40g/L, the amount of ammonia water needed is 0.50 mol/L. The ammonia water is mixed into the Nd(NO₃)₃ solution at the speed of 1.5mL/min, and polyethylene glycol is used to control pH. The process will produce neodymium(III) hydroxide powder with grain size ≤1μm.^[5]

Chemical properties

Neodymium(III) hydroxide can react with acid and produce neodymium salts:

Nd(OH)₃ + 3 H⁺ → Nd³⁺ + 3 H₂O

For example, to create neodymium acetate with neodymium(III) hydroxide:^[6]

Nd(OH)₃ + 3CH₃COOH → Nd(CH₃COO)₃ + 3H₂O

See also

• Neodymium
• Hydroxide
• Lanthanide

References

1. 《无机化学丛书》. 第七卷 钪 稀土元素. 易宪武 等主编. 科学出版社. P_168~171. (2)氢氧化物
2. PubChem. "Neodymium hydroxide (Nd(OH)3)". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-11-24.
3. Elements, American. "Neodymium Hydroxide". American Elements. Retrieved 2022-11-24.
4. 《无机化合物制备手册》. 朱文祥 主编. 化学工业出版社. 【III-119】氢氧化钕（neodymium hydroxide）
5. 刘治平, 王晓铁. 氢氧化镧和氢氧化钕微粉的制备[J]. 《稀土》. Vol.25 No.3 Jun.2004
6. Patnaik, Pradyot (2003). Handbook of inorganic chemicals. McGraw-Hill handbooks. New York, NY: McGraw Hill Education. pp. 639–640. doi:10.5860/choice.40-6428. ISBN 978-0-07-049439-8.