Californium(III) bromide
Chemical compound
From Wikipedia, the free encyclopedia
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.
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| IUPAC name
Californium(III) bromide | |
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CompTox Dashboard (EPA) |
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| Properties | |
| Br3Cf | |
| Molar mass | 491 g·mol−1 |
| Appearance | green solid |
| Structure | |
| Monoclinic, mS16 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]
- 2 CfBr3 → 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]