Neodymium(III) hydroxide is an insoluble
inorganic compound
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as ''inorganic chemistry''.
Inorgan ...
with the
chemical formula
A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as pare ...
Nd(OH)
3.
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(NO
3)
3 + 3 NH
3·H
2O → Nd(OH)
3↓ + 3 NH
4NO
3
If the amount of Nd(NO
3)
3 is 40g/L, the amount of ammonia water needed is 0.50 mol/L. The ammonia water is mixed into the Nd(NO
3)
3 solution at the speed of 1.5mL/min, and
polyethylene glycol
Polyethylene glycol (PEG; ) is a polyether compound derived from petroleum with many applications, from industrial manufacturing to medicine. PEG is also known as polyethylene oxide (PEO) or polyoxyethylene (POE), depending on its molecular wei ...
is used to control pH. The process will produce neodymium(III) hydroxide powder with grain size ≤1μm.
Chemical properties
Neodymium(III) hydroxide can react with
acid
An acid is a molecule or ion capable of either donating a proton (i.e. Hydron, hydrogen cation, H+), known as a Brønsted–Lowry acid–base theory, Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis ...
and produce
neodymium
Neodymium is a chemical element; it has Symbol (chemistry), symbol Nd and atomic number 60. It is the fourth member of the lanthanide series and is considered to be one of the rare-earth element, rare-earth metals. It is a hard (physics), hard, sli ...
salts:
: Nd(OH)
3 + 3 H
+ → Nd
3+ + 3 H
2O
For example, to create
neodymium acetate with neodymium(III) hydroxide:
:Nd(OH)
3 + 3CH
3COOH → Nd(CH
3COO)
3 + 3H
2O
See also
*
Neodymium
Neodymium is a chemical element; it has Symbol (chemistry), symbol Nd and atomic number 60. It is the fourth member of the lanthanide series and is considered to be one of the rare-earth element, rare-earth metals. It is a hard (physics), hard, sli ...
*
Hydroxide
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a single covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. It ...
*
Lanthanide
The lanthanide () or lanthanoid () series of chemical elements comprises at least the 14 metallic chemical elements with atomic numbers 57–70, from lanthanum through ytterbium. In the periodic table, they fill the 4f orbitals. Lutetium (el ...
References
{{hydroxides
Neodymium(III) compounds
Hydroxides