Chemistry:Neptunium silicide
From HandWiki
| Names | |
|---|---|
| Other names
Neptunium disilicide
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| Identifiers | |
3D model (JSmol)
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| Properties | |
| NpSi2 | |
| Appearance | Crystals |
| Density | 9.03 |
| insoluble | |
| Related compounds | |
Related compounds
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Plutonium silicide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Neptunium silicide is a binary inorganic compound of neptunium and silicon with the chemical formula NpSi2.[1] The compound forms crystals and does not dissolve in water.[2]
Synthesis
Heating neptunium trifluoride with powdered silicon in vacuum:[3]
- [math]\displaystyle{ \mathsf{ 4 NpF_3 + 11Si \ \xrightarrow{1500^oC}\ 4NpSi_2 + 3SiF_4 } }[/math]
Physical properties
Neptunium silicide forms crystals[4] of tetragonal crystal system, space group I41/amd, cell parameters: a = 0.396 nm, c = 1.367 nm, Z = 4.[5]
Neptunium disilicide does not dissolve in water.
Chemical properties
Neptunium disilicide reacts with HCl:[3]
- [math]\displaystyle{ \mathsf{ NpSi_2 + 8HCl \ \xrightarrow\ NpCl_4 + 2SiH_4 } }[/math]
References
- ↑ Donnay, J. D. H.; Nowacki, Werner (1954) (in en). Crystal Data: Classification of Substances by Space Groups and their Identification from Cell Dimensions. Geological Society of America. p. 383. ISBN 978-0-8137-1060-0. https://books.google.com/books?id=cY7wPiRzlUYC&q=Neptunium+silicide+NpSi2&pg=PA383. Retrieved 16 August 2021.
- ↑ Koch, Günter (5 October 2013) (in de). Transurane: Teil C: Die Verbindungen. Springer-Verlag. p. 245. ISBN 978-3-662-11547-3. https://books.google.com/books?id=WCi2BgAAQBAJ&q=Neptunium+silicide+NpSi2&pg=PA245. Retrieved 16 August 2021.
- ↑ 3.0 3.1 Sheft, Irving; Fried, Sherman (1950) (in en). New Neptunium Compounds. U.S. Atomic Energy Commission, Technical Information Division. p. 4. https://books.google.com/books?id=c1bcqdRlz4IC&q=Neptunium+silicide&pg=PA4. Retrieved 16 August 2021.
- ↑ Zachariasen, William Houlder (1949) (in en). The Crystal Structure of Uranium Silicides and of CeSi2, NpSi2, and PuSi2. U.S. Atomic Energy Commission, Technical Information Branch. p. 3. https://books.google.com/books?id=AZjEa5VRStgC&q=Neptunium+silicide&pg=PA3. Retrieved 16 August 2021.
- ↑ "mp-21298: NpSi2 (tetragonal, I4_1/amd, 141)". materialsproject.org. https://materialsproject.org/materials/mp-21298/.
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