Neptunium tetrabromide is a binary inorganic compound of neptunium metal and bromine with the chemical formula .
Synthesis The compound can be prepared from the reaction of bromine with metallic neptunium:
Also, a reaction of aluminum bromide with neptunium(IV) oxide:
Physical properties Neptunium tetrabromide forms red-brown hygroscopic crystals of monoclinic crystal system, spatial group P 2/c, cell parameters a = 1.089 nm, b = 0.874 nm, c = 0.705 nm, β = 95.19°, Z = 4.
is easily purified by sublimation in a vacuum.
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