Chemistry:Thorium diiodide
From HandWiki
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3D model (JSmol)
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PubChem CID
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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 | |
| Main hazards | 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). | |
| Infobox references | |
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
Thorium diiodide cn be prepared by heating thorium tetraiodide in stoichiometric amounts of thorium:[3][4]
- ThI
4 + Th → 2 ThI
2
It can also be prepared by directly reacting thorium and iodine:[4]
- Th + I
2 → ThI
2
Thorium diiodide can also be prepared from the decomposition of thorium triiodide at temperatures above 550 °C:[4]
- 2 ThI
3 → ThI
4 + ThI
2
Properties
Like the diiodides of cerium, praseodymium and gadolinium, it has a metallic gold lustre and high electrical conductivity.[3]
References
- ↑ Guggenberger, Lloyd J.; Jacobson, R. A. (November 1968). "Crystal structure of thorium diiodide" (in en). Inorganic Chemistry 7 (11): 2257–2260. doi:10.1021/ic50069a017. ISSN 0020-1669. https://pubs.acs.org/doi/abs/10.1021/ic50069a017.
- ↑ Edelstein, Norman M.; Fuger, J.; Morss, Lester R. (2010). The chemistry of the actinide and transactinide elements (4th ed.). Dordrecht: Springer. ISBN 978-94-007-0211-0.
- ↑ 3.0 3.1 3.2 Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1272. ISBN 978-0-08-037941-8.
- ↑ 4.0 4.1 4.2 Handbuch der präparativen anorganischen Chemie. 1 (3., umgearb. Aufl ed.). Stuttgart: Enke. 1975. ISBN 978-3-432-02328-1.
| HI | He | ||||||||||||||||
| LiI | BeI2 | BI3 | CI4 | NI3 | I2O4, I2O5, I4O9 |
IF, IF3, IF5, IF7 |
Ne | ||||||||||
| NaI | MgI2 | AlI3 | SiI4 | PI3, P2I4 |
S | ICl, ICl3 |
Ar | ||||||||||
| KI | CaI2 | Sc | TiI4 | VI3 | CrI3 | MnI2 | FeI2 | CoI2 | NiI2 | CuI | ZnI2 | Ga2I6 | GeI2, GeI4 |
AsI3 | Se | IBr | Kr |
| RbI | SrI2 | YI3 | ZrI4 | NbI5 | Mo | Tc | Ru | Rh | Pd | AgI | CdI2 | InI3 | SnI4, SnI2 |
SbI3 | TeI4 | I | Xe |
| CsI | BaI2 | HfI4 | TaI5 | W | Re | Os | Ir | Pt | AuI | Hg2I2, HgI2 |
TlI | PbI2 | BiI3 | Po | AtI | Rn | |
| Fr | RaI2 | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og | |
| ↓ | |||||||||||||||||
| La | Ce | Pr | Nd | Pm | SmI2 | Eu | Gd | TbI3 | Dy | Ho | Er | Tm | Yb | Lu | |||
| Ac | ThI4 | Pa | UI3, UI4 |
Np | Pu | Am | Cm | Bk | Cf | EsI3 | Fm | Md | No | Lr | |||
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