Neodymium(III) hydroxide

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

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

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