Chemistry:Lanthanum diiodide
From HandWiki
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| Identifiers | |
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3D model (JSmol)
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| Properties | |
| I2La | |
| Molar mass | 392.71441 g·mol−1 |
| Appearance | blue-black solid[1] |
| Density | 5.46 g/cm−3[1] |
| Melting point | 830 °C[1] |
| Related compounds | |
Other cations
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cerium diiodide praseodymium diiodide |
Related compounds
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lanthanum(III) iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Lanthanum diiodide is an iodide of lanthanum, with the chemical formula of LaI2. It is an electride, actually having a chemical formula of La3+[(I−)2e−].[2]
Preparation
Lanthanum diiodide can be obtained from the reduction of lanthanum(III) iodide with lanthanum metal under a vacuum at 800 to 900 °C:[3]
- La + 2 LaI
3 → LaI
2
It can also be obtained by reacting lanthanum and mercury(II) iodide:[3]
- La + HgI
2 → LaI
2 + Hg
It was first created by John D. Corbett in 1961.[4]
Properties
Lanthanum diiodide is a blue-black solid with metallic lustre, which is easily hydrolyzed into the iodide oxide.[3] It has a MoSi2-type structure, with the space group I4/mmm (No. 139).[5]
References
- ↑ 1.0 1.1 1.2 Holt Jr., Smith L. (1983). Inorganic syntheses. Volume 22. New York. p. 36. ISBN 978-0-470-13288-3. OCLC 86223480.
- ↑ Holleman, Arnold F.; Walter de Gruyter GmbH & Co. KG (2017) (in de). Anorganische Chemie Band 2. Nebengruppenelemente, Lanthanoide, Actinoide, Transactinoide. Berlin. p. 1789. ISBN 978-3-11-051854-2. OCLC 968134924.
- ↑ 3.0 3.1 3.2 Brauer, Georg (1963). Handbook of Preparative Inorganic Chemistry V1.. Burlington: Elsevier Science. p. 1081. ISBN 978-0-323-16127-5. OCLC 843200092.
- ↑ Jungmann, Angelika; Claessen, R.; Zimmermann, R.; Meng, Ge; Steiner, P.; Hüfner, S.; Tratzky, S.; Stöwe, K. et al. (1995). "Photoemission of LaI2 and CeI2". Zeitschrift für Physik B (Springer Science and Business Media LLC) 97 (1): 25–34. doi:10.1007/bf01317584. ISSN 0722-3277. Bibcode: 1995ZPhyB..97...25J.
- ↑ Riedel, Erwin; Janiak, Christoph; Meyer, Hans-Jürgen (2012) (in de). Riedel, moderne anorganische Chemie. Berlin: De Gruyter. p. 240. ISBN 978-3-11-024900-2. OCLC 781540844.
| 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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