Chemistry:Californium(II) iodide
| Names | |
|---|---|
| Other names
Californium diiodide
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| Identifiers | |
3D model (JSmol)
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| Properties | |
| CfI2 | |
| Molar mass | 505 g·mol−1 |
| Appearance | dark purple solid |
| Density | g/cm3 |
| insoluble | |
| Structure | |
| cubic | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Californium(II) iodide is a binary inorganic compound of californium and iodine with the formula CfI2.[1]
Synthesis
It can be produced by reducing californium triiodide with hydrogen in a quartz thin tube at 570 °C:[2]
- 2CfI
3 + H
2 → 2CfI
2 + 2HI
- 2CfI
Physical properties
The compound forms a dark purple solid. At slightly higher temperatures, it melts and reacts with the silica in the thin tube, producing CfOI.[citation needed]
Californium diiodide has two crystal structures, one is CdCl2-type crystal structure, stable at room temperature, with lattice parameters a = 743.4 ± 1.1 pm and α = 35.83 ± 0.07°; the other is metastable, of CdI2-type with lattice parameters a = 455.7 ± 0.4 pm and c = 699.2 ± 0.6 pm.[3] Californium diiodide has an absorption band in the wavelength range from 300 to 1100 nm, which proves the existence of Cf(II).[4]
References
- ↑ "WebElements Periodic Table » Californium » californium dioxide". webelements.com. https://www.webelements.com/compounds/californium/californium_dioxide.html.
- ↑ Stuart, Sam (11 September 2013) (in en). XXIVth International Congress of Pure and Applied Chemistry: Plenary and Main Section Lectures Presented at Hamburg, Federal Republic of Germany, 2–8 September 1973. Elsevier. p. 117. ISBN 978-1-4832-7868-1. https://books.google.com/books?id=dTIXBQAAQBAJ&dq=Californium+diiodide&pg=PA117. Retrieved 11 April 2023.
- ↑ Macintyre, Jane E. (23 July 1992) (in en). Dictionary of Inorganic Compounds. CRC Press. p. 2826. ISBN 978-0-412-30120-9. https://books.google.com/books?id=9eJvoNCSCRMC&dq=Californium+diiodide&pg=PA2826. Retrieved 11 April 2023.
- ↑ Wild, J. F.; Hulet, E. K.; Lougheed, R. W.; Hayes, W. N.; Peterson, J. R.; Fellows, R. L.; Young, J. P. (1 January 1978). "Studies of californium(II) and (III) iodides" (in en). Journal of Inorganic and Nuclear Chemistry 40 (5): 811–817. doi:10.1016/0022-1902(78)80157-2. ISSN 0022-1902. https://www.sciencedirect.com/science/article/abs/pii/0022190278801572. Retrieved 11 April 2023.
| 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 | |||
 |  |
