Thulium(III) iodide

Thulium(III) iodide
Names
Other names
Thulium iodide
Thulium triiodide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.052 Edit this at Wikidata
EC Number
  • 237-472-4
  • InChI=1S/3HI.Tm/h3*1H;/q;;;+3/p-3
    Key: LZOMHYVAEHYDST-UHFFFAOYSA-K
  • I[Tm](I)I
Properties
TmI3
Appearance Yellow hexagonal crystal[1]
Melting point 1015 °C[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Thulium(III) iodide is an iodide of thulium, with the chemical formula of TmI3. Thulium(III) iodide is used as a component of metal halide lamps.[3]

Preparation

Mercury(II) iodide can be heated with thulium to obtain thulium(III) iodide:[4]

2 Tm + 3 HgI2 → 2 TmI3 + 3 Hg

The mercury produced in the reaction can be removed by distillation.[5][4]

The thulium(III) iodide hydrate crystallized from solution can be heated with ammonium iodide to obtain the anhydrous form.[6][4]

Properties

Thulium(III) iodide is a yellow, highly hygroscopic solid with a bismuth(III) iodide-type crystal structure.[4] It forms in the hexagonal crystal system.[6] Its hydrate can be heated in air to obtain TmOI. Its anhydrous form can be heated with thulium to obtain TmI2:[7]

2 TmI3 + Tm → 3 TmI2

References

  1. ^ 王世华,谷亚平,蒋盛邦.在Tm-HgI2体系中TmI2生成机理[J].物理化学学报,1987(03):334-336.
  2. ^ Jantsch, G.; Zeitschrift fuer Anorganische und Allgemeine Chemie 1933, V212, P65-83 CAPLUS
  3. ^ Flesch, Peter G. (2007). Light and Light Sources: High-Intensity Discharge Lamps. Springer. p. 45. ISBN 9783540326847.
  4. ^ a b c d 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.
  5. ^ 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
  6. ^ a b 无机化学丛书 第七卷 钪 稀土元素. 科学出版社. pp 211
  7. ^ L.B. Asprey, F.H. Kruse (1960). "Divalent thulium. Thulium di-iodide". Journal of Inorganic and Nuclear Chemistry. 13 (1–2): 32–35. doi:10.1016/0022-1902(60)80232-1. Archived from the original on 2018-06-09. Retrieved 2018-04-13.（注：此文献指出Tm+HgI2的反应生成TmI2）