Caesium hydride or cesium hydride (CsH) is a compound of caesium and hydrogen. It is an alkali metal hydride. It was the first substance to be created by light-induced particle formation in metal vapor, and showed promise in early studies of an ion propulsion system using caesium. It is the most reactive stable alkaline metal hydride of all. It reacts with water extremely vigorously.
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||133.91339 g/mol|
|Appearance||White or colorless crystals or powder|
|Melting point||~170 °C (decomposes)|
|Face centered cubic|
|CsF, CsCl, CsBr, CsI|
|LiH, NaH, KH, RbH,|
and all other hydrides
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The caesium nuclei in CsH can be hyperpolarized through interactions with an optically pumped caesium vapor in a process known as spin-exchange optical pumping (SEOP). SEOP can increase the nuclear magnetic resonance (NMR) signal of caesium nuclei by an order of magnitude.
At room temperature and atmospheric pressure, CsH has the same structure as NaCl.
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- Tam, A.; Moe, G.; Happer, W. (1975). "Particle Formation by Resonant Laser Light in Alkali-Metal Vapor". Phys. Rev. Lett. 35 (24): 1630–33. Bibcode:1975PhRvL..35.1630T. doi:10.1103/PhysRevLett.35.1630.
- Burkhart, J. A.; Smith, F. J. (November 1963). "Application of dynamic programming to optimizing the orbital control process of a 24-hour communications satellite". NASA Technical Report.
- Ishikawa, K.; Patton, B.; Jau, Y.-Y.; Happer, W. (2007). "Spin Transfer from an Optically Pumped Alkali Vapor to a Solid". Phys. Rev. Lett. 98 (18): 183004. Bibcode:2007PhRvL..98r3004I. doi:10.1103/PhysRevLett.98.183004. PMID 17501572.
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