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| Other names
Thulium diiodide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.151.436 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| I2Tm | |
| Molar mass | 422.74316 g·mol−1 |
| Appearance | Dark brown hexagonal crystals[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Thulium diiodide is an inorganic compound with the chemical formula TmI2.
Preparation and properties
Thulium diiodide can be obtained by reacting thulium(III) iodide and alkali metals in a tantalum container at 700~800°C. TmI2 can be obtained by using lithium and sodium as reducing agents, while potassium, rubidium and caesium can generate the perovskite structure MTmI3.[2] TmI2 can also react directly with CsI (340 °C) to generate CsTmI3.[3]
Thulium iodide can also be prepared by reacting thulium and mercury(I) iodide. The reaction process is as follows:[1]
- 2 Tm + 3 HgI2 → 2 TmI3 + 3 Hg
- Tm + HgI2 → TmI2 + Hg
- Tm + 2 TmI3 → 3 TmI2
References
- 1 2 Shihua, Wang; Yaping, Gu; Shengbang, Jiang (1987). "FORMATION MECHANISM OF TmI<SUB>2</SUB> IN Tm-HgI<SUB>2 </SUB>SYSTEM". Acta Physico-Chimica Sinica. 3 (03): 334–336. doi:10.3866/pku.whxb19870320. ISSN 1000-6818.
- ↑ Schilling, Gaby; Kunert, Christine; Schleid, Thomas; Meyer, Gerd (Dec 1992). "Metallothermische Reduktion der Tribromide und ‐iodide von Thulium und Ytterbium mit Alkalimetallen". Zeitschrift für anorganische und allgemeine Chemie. 618 (12): 7–12. doi:10.1002/zaac.19926180102. ISSN 0044-2313.
- ↑ 罗时敏,王世华.CsTmI3生成机理及其相转变[J].物理化学学报,1990(01):93-96.
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