Californium(III) bromide

Californium(III) bromide is an inorganic compound, a salt with a chemical formula CfBr₃. Like in californium(III) oxide (Cf₂O₃) and other californium halides, including californium(III) fluoride (CfF₃), californium(III) chloride, and californium(III) iodide (CfI₃), the californium atom has an oxidation state of +3.

Californium(III) bromide

Names
IUPAC name Californium(III) bromide
Identifiers
CAS Number	28064-96-2 249Cf: 24297-29-8
3D model (JSmol)	Interactive image
ChemSpider	28548254
PubChem CID	249Cf: 185562
CompTox Dashboard (EPA)	DTXSID901336619
InChI InChI=1S/3BrH.Cf/h3*1H;/p-3 Key: NJIJEQJUGGORBI-UHFFFAOYSA-K
SMILES [Br-].[Br-].[Br-].[Cf]
Properties
Chemical formula	Br3Cf
Molar mass	491 g·mol−1
Appearance	green solid
Structure
Crystal structure	Monoclinic, mS16
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Properties

Californium(III) bromide is shown to crystallize in both the AlCl₃ and FeCl₃ type structures. In the former structure, the californium ion is six coordinated and the three independent Cf-Br bond lengths are 279.5±0.9 pm, 282.7±1.1 pm, and 282.8±0.8 pm.^[1]

Californium(III) bromide partially decomposes into californium(II) bromide under high temperature.^[2]

${\displaystyle {\ce {2 CfBr3 ->[\Delta T] 2 CfBr2 + Br2}}}$

In the radioactive decay of berkelium-249 to californium-249, the oxidation number and crystal structure are preserved. The six-coordinate berkelium(III) bromide (AlCl₃-type monoclinic structure) decays to produce a six-coordinate californium(III) bromide, whereas an eight-coordinate berkelium(III) bromide (PuBr₃-type, orthorhombic structure) produces an eight-coordinate californium(III) bromide.^[3]

See also

• Californium
• Californium compounds