Protactinium tetrafluoride


Protactinium tetrafluoride is a binary inorganic compound of protactinium metal and fluorine with the chemical formula.

Synthesis

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:

Physical properties

forms dark brown, Monoclinic [crystal system|monoclinic], needlelike crystals of [uranium tetrafluoride|] structure. 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.

Chemical properties

Protactinium tetrafluoride reacts with oxygen and fluorine:
The compound reacts with alkalis:
The metal is displaced from the salt by barium: