Lutetium(III) iodide
Chemical compound From Wikipedia, the free encyclopedia
Lutetium(III) iodide or lutetium iodide is an inorganic compound consisting of iodine and lutetium, with the chemical formula of LuI3.
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| Names | |
|---|---|
| Other names
Lutetium iodide Lutetium triiodide | |
| Identifiers | |
| ChemSpider | |
| ECHA InfoCard | 100.034.054 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| LuI3 | |
| Appearance | solid[1] |
| Density | 5.60 g/cm−3[1][2][3][4] |
| Melting point | 1050 °C[1] |
| Boiling point | 1210 °C[5] |
| Hazards | |
| GHS labelling: | |
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| Warning[1] | |
| H315, H319, H335 | |
| P261, P280, P304+P340, P305+P351+P338, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Lutetium(III) iodide can be obtained by reacting lutetium with iodine:[5][2]
- 2 Lu + 3 I2 → LuI3
Lutetium(III) iodide can also obtained by the reacting metallic lutetium with mercury iodide in vacuum at 500 °C:[5]
- 2 Lu + 3 HgI2 → 2 LuI3 + 3 Hg
The elemental mercury generated in the reaction can be removed by distillation.[6]
The lutetium(III) iodide hydrate crystallized from the solution can be heated with ammonium iodide to obtain the anhydrate.[7][5]
Properties
It is a brown, very hygroscopic solid with a bismuth(III) iodide-type crystal structure. In air, it quickly absorbs moisture and forms hydrates.[2][3][4] The corresponding oxide iodide is also readily formed at elevated temperature.[5]
Lutetium(III) iodide doped with cerium is designed for use in PET scanners.[8] Lutetium iodide can be used together with yttrium iodide and gadolinium iodide in LuI3-YI3-GdI3 scintillators to detect neutron and gamma radiation.[9]
References
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