neodymium(III) hydroxide
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| ImageFile = Neodymium(III)_hydroxide.jpg
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| ChemSpiderID = 77047
| PubChem = 85433
| EC_number = 240-514-4
| SMILES = [Nd+3].[OH-].[OH-].[OH-]
| StdInChI=1S/Nd.3H2O/h;3*1H2/q+3;;;/p-3
| StdInChIKey = ZBAQHMBLDSQPHC-UHFFFAOYSA-K
| CASNo = 16469-17-3
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| Section2 = {{Chembox Properties
| Formula = Nd(OH)3
| MolarMass = 195.266
| Appearance = rose solid《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. P168~171. (2)氢氧化物
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| Section8 = {{Chembox Related
| OtherFunction =
| OtherAnions = neodymium(III) oxide
| OtherCations = praseodymium(III) hydroxide
samarium(III) hydroxide
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Neodymium(III) hydroxide is an insoluble inorganic compound with the chemical formula Nd(OH)3.{{Cite web |last=PubChem |title=Neodymium hydroxide (Nd(OH)3) |url=https://pubchem.ncbi.nlm.nih.gov/compound/16217370 |access-date=2022-11-24 |website=pubchem.ncbi.nlm.nih.gov |language=en}}{{Cite web |last=Elements |first=American |title=Neodymium Hydroxide |url=https://www.americanelements.com/neodymium-hydroxide-16469-17-3 |access-date=2022-11-24 |website=American Elements |language=en}}
Preparation
Neodymium(III) nitrate and ammonia water will react to produce neodymium(III) hydroxide:《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）
: 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.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
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:{{Cite book |last=Patnaik |first=Pradyot |title=Handbook of inorganic chemicals |journal=Choice Reviews Online |date=2003 |publisher=McGraw Hill Education |isbn=978-0-07-049439-8 |series=McGraw-Hill handbooks |volume=40 |issue=11 |location=New York, NY |pages=639–640 |language=en |doi=10.5860/choice.40-6428|doi-broken-date=1 July 2025 }}
:Nd(OH)3 + 3CH3COOH → Nd(CH3COO)3 + 3H2O