Identifiers | |
---|---|
Properties | |
F4Pa | |
Molar mass | 307.02949 g·mol−1 |
Appearance | dark brown crystals |
Related compounds | |
Related compounds
|
Uranium tetrafluoride, neptunium tetrafluoride, plutonium tetrafluoride |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Protactinium tetrafluoride is a binary inorganic compound of protactinium metal and fluorine with the chemical formula PaF4. [1]
Protactinium tetrafluoride can be obtained by fluorinating protactinium(IV) oxide with a hydrogen fluoride / hydrogen mixture at 600 °C:
The effect of hydrogen fluoride and hydrogen on protactinium(V) oxide:
PaF4 forms dark brown, monoclinic, needlelike crystals of UF4 structure. [2] [3] The cell parameters are: a = 1.27 nm, b = 1.07 nm, c = 0.842 nm, β = 126.3°.
The compound is soluble in aqueous ammonium fluoride solutions. [4]
Protactinium tetrafluoride reacts with oxygen and fluorine: [2]
The compound reacts with alkalis:
The compound is displaced from the salt by barium: