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Chemical compound From Wikipedia, the free encyclopedia
Uranium triiodide is an inorganic compound with the chemical formula UI3. It is a black solid that is soluble in water.
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Identifiers | |
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3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.033.992 |
EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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Properties | |
UI3 | |
Molar mass | 618.74232 g/mol |
Appearance | black solid |
Density | 6.78 g/cm3[1] |
Melting point | 766[2] °C (1,411 °F; 1,039 K) |
Structure | |
orthorhombic | |
Ccmm, No. 63 | |
a = 432.8 pm, b = 1401.1 pm, c = 1000.5 pm | |
Formula units (Z) |
4 |
Hazards | |
GHS labelling: | |
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Danger | |
H300, H330, H373, H411 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Uranium triiodide can be obtained from the direct reaction of its constituent elements:[3]
When the reaction is conducted in tetrahydrofuran (THF), the product is the blue complex UI3(THF)4.[4]
It crystallizes in the orthorhombic crystal system (plutonium tribromide-type) in the space group Ccmm with the lattice parameters a = 432.8 pm, b = 1401.1 pm, and c = 1000.5 pm and four formula units per unit cell.[1]
Uranium triiodide can be used as a Lewis acid catalyst for various Diels-Alder reactions carried out under mild conditions.[5]
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