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Identifiers | |||
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3D model (
JSmol)
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Properties | |||
Br3Np | |||
Molar mass | 477 g·mol−1 | ||
Appearance | green solid [1] | ||
Density | 6.62 g·cm−3 [2] | ||
Structure | |||
α-NpBr3:
hexagonal β-NpBr3: orthorhombic | |||
α-NpBr3: P63/m (No. 176) β-NpBr3: Ccmm (No. 63) | |||
a = 791.7 pm (α), 411 pm (β), b = 791.7 pm (α), 1265 pm (β), c = 438.2 pm (α), 915 pm (β)
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Related compounds | |||
Other
anions
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neptunium(III) fluoride neptunium(III) chloride neptunium(III) iodide | ||
Other
cations
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uranium(III) bromide plutonium(III) bromide | ||
Related compounds
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neptunium(IV) bromide | ||
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Neptunium(III) bromide is a bromide of neptunium, with the chemical formula of NpBr3.
Neptunium(III) bromide can be prepared by reacting neptunium dioxide and aluminium bromide: [3]
Neptunium(III) bromide is a green solid. It can crystallize in two crystal systems:
Neptunium(III) bromide also has a green hexahydrate, which is monoclinic. [3]
At 425 °C, neptunium(III) bromide bromide can be further brominated by bromine to form neptunium(IV) bromide. [2]