Thorium diiodide
(Redirected from ThI2)
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| ThI2 | |
| Molar mass | 612.75 |
| Appearance | golden metallic |
| Density | 7.21 g/cm3[1] |
| Melting point | 850 °C[2] |
| soluble | |
| Structure | |
| hexagonal | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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Radioactive |
| Related compounds | |
Other cations
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Cerium diiodide Praseodymium diiodide Gadolinium diiodide |
Related compounds
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Thorium triiodide Thorium tetraiodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thorium diiodide is an iodide of thorium, with the chemical formula of ThI2. It is an electride with the ionic formula Th4+(I−)2e−2. It is air-sensitive.[3]
Preparation
[edit | edit source]Thorium diiodide cn be prepared by heating thorium tetraiodide in stoichiometric amounts of thorium:[3][4]
- ThI4 + Th → 2 ThI2
It can also be prepared by directly reacting thorium and iodine:[4]
- Th + I2 → ThI2
Thorium diiodide can also be prepared from the decomposition of thorium triiodide at temperatures above 550 °C:[4]
- 2 ThI3 → ThI4 + ThI2
Properties
[edit | edit source]Like the diiodides of cerium, praseodymium and gadolinium, it has a metallic gold lustre and high electrical conductivity.[3]
References
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