- Source: Praseodymium(IV) fluoride
- Praseodimium(IV) fluorida
- Praseodimium(III) fluorida
- Praseodimium
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- Tembaga
- Fluorin
- Kripton
- Neptunium
- Selenium
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- Praseodymium(IV) fluoride
- Praseodymium fluoride
- Praseodymium
- Praseodymium(III) fluoride
- Uranium tetrafluoride
- Praseodymium(III) chloride
- List of CAS numbers by chemical compound
- Praseodymium compounds
- List of inorganic compounds
- Praseodymium(III) phosphate
Praseodymium(IV) fluoride (also praseodymium tetrafluoride) is a binary inorganic compound, a highly oxidised metal salt of praseodymium and fluoride with the chemical formula PrF4.
Synthesis
Praseodymium(IV) fluoride can be prepared by the effect of krypton difluoride on praseodymium(IV) oxide:
P
r
O
2
+
2
K
r
F
2
→
P
r
F
4
+
O
2
+
2
K
r
{\displaystyle {\mathsf {PrO_{2}+2KrF_{2}\ {\xrightarrow {}}\ PrF_{4}+O_{2}+2Kr}}}
Praseodymium(IV) fluoride can also be made by the dissolution of sodium hexafluoropraseodymate(IV) in liquid hydrogen fluoride:
N
a
2
[
P
r
F
6
]
+
2
H
F
→
P
r
F
4
↓
+
2
N
a
H
F
2
{\displaystyle {\mathsf {Na_{2}[PrF_{6}]+2HF\ {\xrightarrow {}}\ PrF_{4}\downarrow +2NaHF_{2}}}}
Properties
Praseodymium(IV) fluoride forms light yellow crystals. The crystal structure is anticubic and isomorphic to that of uranium tetrafluoride UF4. It decomposes when heated:
2
P
r
F
4
→
90
o
C
2
P
r
F
3
+
F
2
{\displaystyle {\mathsf {2PrF_{4}\ {\xrightarrow {90^{o}C}}\ 2PrF_{3}+F_{2}}}}
Due to the high normal potential of the tetravalent praseodymium cations (Pr3+ / Pr4+: +3.2 V), praseodymium(IV) fluoride decomposes in water, releasing oxygen, O2.
See also
Praseodymium(III) fluoride
Uranium tetrafluoride