Neptunium silicide: Difference between revisions
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==Synthesis== |
==Synthesis== |
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Heating [[neptunium trifluoride]] with powdered silicon in vacuum<ref name="NNC">{{cite book |last1=Sheft |first1=Irving |last2=Fried |first2=Sherman |title=New Neptunium Compounds |date=1950 |publisher=U.S. Atomic Energy Commission, Technical Information Division |page=4 |url=https://books.google.com/books?id=c1bcqdRlz4IC&q=Neptunium+silicide&pg=PA4 |access-date=16 August 2021 |language=en}}</ref> |
Heating [[neptunium trifluoride]] with powdered silicon in vacuum:<ref name="NNC">{{cite book |last1=Sheft |first1=Irving |last2=Fried |first2=Sherman |title=New Neptunium Compounds |date=1950 |publisher=U.S. Atomic Energy Commission, Technical Information Division |page=4 |url=https://books.google.com/books?id=c1bcqdRlz4IC&q=Neptunium+silicide&pg=PA4 |access-date=16 August 2021 |language=en}}</ref> |
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::<math>\mathsf{ 4 NpF_3 + 11Si \ \xrightarrow{1500^oC}\ 4NpSi_2 + 3SiF_4 }</math> |
::<math>\mathsf{ 4 NpF_3 + 11Si \ \xrightarrow{1500^oC}\ 4NpSi_2 + 3SiF_4 }</math> |
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==Chemical properties== |
==Chemical properties== |
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Neptunium disilicide reacts with HCl<ref name="NNC"/> |
Neptunium disilicide reacts with HCl:<ref name="NNC"/> |
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::<math>\mathsf{ NpSi_2 + 8HCl \ \xrightarrow\ NpCl_4 + 2SiH_4 }</math> |
::<math>\mathsf{ NpSi_2 + 8HCl \ \xrightarrow\ NpCl_4 + 2SiH_4 }</math> |
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Revision as of 21:16, 30 August 2021
| Names | |
|---|---|
| Other names
Neptunium disilicide
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| Identifiers | |
3D model (JSmol)
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| Properties | |
| Si2 | |
| Molar mass | 56.170 g·mol−1 |
| 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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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
Heating neptunium trifluoride with powdered silicon in vacuum:[3]
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]
References
- ^ 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.