Neptunium(III) bromide
{{Chembox
|ImageFileL1=UCl3 without caption.png
|ImageFileR1=Unit_cell_of_PuBr3.png
|Section3={{Chembox Structure
|CrystalStruct=α-NpBr3: hexagonal
β-NpBr3: orthorhombic
| SpaceGroup= α-NpBr3: P63/m (No. 176)
β-NpBr3: Ccmm (No. 63)
| LattConst_a=791.7 pm (α), 411 pm (β)
|LattConst_c=438.2 pm (α), 915 pm (β)
|LattConst_b=791.7 pm (α), 1265 pm (β)
}}
|Section1={{Chembox Identifiers
| CASNo=20730-39-6
| PubChem =
| StdInChI=1S/3BrH.Np/h3*1H;/q;;;+3/p-3
| StdInChIKey=HVGILCLFCSGPEI-UHFFFAOYSA-K
|SMILES=[Np+3].[Br-].[Br-].[Br-]
}}
|Section2={{Chembox Properties
| Appearance= green solid{{Holleman&Wiberg| page=1969 }}
|Np=1|Br=3
| Density= 6.62 g·cm−3Gmelins Handbuch der anorganischen Chemie, System No. 71, Transurane, Teil C, S. 148–150.
|MeltingPt=
|BoilingPt=
|Solubility=
}}
|Section8={{Chembox Related
| OtherCompounds=neptunium(IV) bromide
| OtherCations=uranium(III) bromide
plutonium(III) bromide
| OtherAnions=neptunium(III) fluoride
neptunium(III) chloride
neptunium(III) iodide
}}
}}
Neptunium(III) bromide is a bromide of neptunium, with the chemical formula of NpBr3.
Preparation
Neptunium(III) bromide can be prepared by reacting neptunium dioxide and aluminium bromide:Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3, S. 1268.
:{{chem2|6 NpO2 + 8 AlBr3 -> 6 NpBr3 + 4 Al2O3 + 3 Br2}}
Properties
Neptunium(III) bromide is a green solid. It can crystallize in two crystal systems:
- α-NpBr3 is hexagonal with lattice parameters a = 791.7 pm and c = 438.2 pm. It has the same structure as uranium trichloride.
- β-NpBr3 is orthorhombic with lattice parameters a = 411 pm, b = 1265 pm and c = 915 pm. It has the same structure as the bromides from plutonium to californium.
Neptunium(III) bromide also has a green hexahydrate, which is monoclinic.
= Reactions =
References
{{reflist}}
External reading
- {{Citation |last1=Yoshida |first1=Zenko |title=Neptunium |date=2006 |url=http://link.springer.com/10.1007/1-4020-3598-5_6 |work=The Chemistry of the Actinide and Transactinide Elements |pages=699–812 |editor-last=Morss |editor-first=Lester R. |access-date=2023-12-23 |place=Dordrecht |publisher=Springer Netherlands |language=en |doi=10.1007/1-4020-3598-5_6 |isbn=978-1-4020-3555-5 |last2=Johnson |first2=Stephen G. |last3=Kimura |first3=Takaumi |last4=Krsul |first4=John R. |editor2-last=Edelstein |editor2-first=Norman M. |editor3-last=Fuger |editor3-first=Jean|url-access=subscription }}
- {{Citation |last=Keller |first=C. |title=Die Chemie des Neptuniums |date=1969 |url=http://link.springer.com/10.1007/BFb0051170 |work=Anorganische Chemie |series=Fortschritte der Chemischen Forschung |volume=13/1 |pages=1–124 |access-date=2023-12-23 |place=Berlin/Heidelberg |publisher=Springer-Verlag |language=de |doi=10.1007/bfb0051170 |isbn=978-3-540-04488-8|url-access=subscription }}
{{Neptunium compounds}}
{{Bromides}}
{{Actinide halides}}