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| Identifiers | |
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3D model (JSmol) |
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| 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).
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Protactinium tetrafluoride is a binary inorganic compoundofprotactinium 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:
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