Lutetium(III) iodide or lutetium iodide is an inorganic compound consisting of iodine and lutetium, with the chemical formula of LuI3.
Preparation
Lutetium(III) iodide can be obtained by reacting lutetium with iodine:Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 1077.
2 Lu + 3 I2 → 2 LuI3
Lutetium(III) iodide can also obtained by the reacting metallic lutetium with mercury iodide in vacuum at 500 °C:
2 Lu + 3 HgI2 → 2 LuI3 + 3 Hg
The elemental mercury generated in the reaction can be removed by distillation.Asprey, L. B.; Keenan, T. K.; Kruse, F. H. Preparation and crystal data for lanthanide and actinide triiodides. Inorg. Chem., 1964. 3 (8): 1137-1240
The lutetium(III) iodide hydrate crystallized from the solution can be heated with ammonium iodide to obtain the anhydrate.无机化学丛书 第七卷 钪 稀土元素. 科学出版社. pp 211
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.Webelements: Lutetium: lutetium triiodide Retrieved 31.3.2018Americanelements.com: Lutetium Iodide Retrieved 31.3.2018 The corresponding oxide iodide is also readily formed at elevated temperature.
Lutetium(III) iodide doped with cerium is designed for use in PET scanners. Lutetium iodide can be used together with yttrium iodide and gadolinium iodide in LuI3-YI3-GdI3 scintillators to detect neutron and gamma radiation.
References