-fluorid.png) | |
| Identifiers | |
|---|---|
3D model (JSmol) | |
| |
| |
| 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 theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Protactinium tetrafluoride is a binaryinorganic compound ofprotactinium metal andfluorine with the chemical formulaPaF4.[1]
Protactinium tetrafluoride can be obtained by fluorinatingprotactinium(IV) oxide with a hydrogen fluoride / hydrogen mixture at 600 °C:
The effect ofhydrogen fluoride and hydrogen onprotactinium(V) oxide:
PaF4 forms dark brown,monoclinic, needlelike crystals ofUF4 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 aqueousammonium fluoride solutions.[4]
Protactinium tetrafluoride reacts with oxygen and fluorine:[2]
The compound reacts with alkalis:
The metal is displaced from the salt by barium:
