Neptunium silicide
From Wikipedia, the free encyclopedia
| Names | |
|---|---|
| Other names
Neptunium disilicide
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| Identifiers | |
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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).
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Chemical compound
Neptunium silicide is a binary inorganic compound of neptunium and silicon with the chemical formula NpSi
2.[1] The compound forms crystals and does not dissolve in water.[2]
Synthesis
[edit ]Heating neptunium trifluoride with powdered silicon in vacuum:[3]
- {\displaystyle {\mathsf {4NpF_{3}+11Si\ \xrightarrow {1500^{o}C} \ 4NpSi_{2}+3SiF_{4}}}}
Physical properties
[edit ]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
[edit ]Neptunium disilicide reacts with HCl:[3]
- NpSi2 + 8HCl → NpCl4 + 2SiH4
References
[edit ]- ^ Donnay, J. D. H.; Nowacki, Werner (1954). 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 . Retrieved 16 August 2021.
- ^ Koch, Günter (5 October 2013). Transurane: Teil C: Die Verbindungen (in German). Springer-Verlag. p. 245. ISBN 978-3-662-11547-3 . Retrieved 16 August 2021.
- ^ a b Sheft, Irving; Fried, Sherman (1950). New Neptunium Compounds. U.S. Atomic Energy Commission, Technical Information Division. p. 4. Retrieved 16 August 2021.
- ^ Zachariasen, William Houlder (1949). The Crystal Structure of Uranium Silicides and of CeSi2, NpSi2, and PuSi2. U.S. Atomic Energy Commission, Technical Information Branch. p. 3. Retrieved 16 August 2021.
- ^ "mp-21298: NpSi2 (tetragonal, I4_1/amd, 141)". materialsproject.org . Retrieved 16 August 2021.