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- Path: sparky!uunet!spool.mu.edu!agate!sam.cchem.berkeley.edu!gezelter
- From: gezelter@sam.cchem.berkeley.edu (Dan Gezelter)
- Newsgroups: alt.cesium
- Subject: Cesium, of course.
- Date: 9 Sep 1992 06:03:41 GMT
- Organization: University of California, Berkeley
- Lines: 33
- Distribution: world
- Message-ID: <18k43tINNo73@agate.berkeley.edu>
- NNTP-Posting-Host: sam.cchem.berkeley.edu
-
- Cesium's more interesting properties:
- -4
- % of earth's crust: 3.2 x 10
-
- Density: 1.873 g / cm^3
- Melting Point: 28.5 C
- Boiling Point: 705 C
- Sublimation energy (@ 25 C): 78.78 kJ/mol
- Ionization energies: (in eV)
- 1st: 3.894
- 2nd: 25.1
- 3rd: 35
- Atomic radius: 263 pm
- Heat of hydration (from a gas): 264 kJ/mol
-
- Cesium can be obtained by reduction of Cs CO with carbon or byh the
- 2 3
- thermal decomposition of cesium tartarate.
-
- Cs CO + 2C ---> 2Cs + 3CO
- 2 3
- Cesium is used in photoelectric cells, since the absorption of radiant
- energy in the visible region of the spectrum can remove an electron
- because of its low ionization energy. Cesium also serves as a
- "getter" in vacuum tubes, removing the last traces of corrosive gases
- in the tube when it is first put into use.
-
-
- Back off, man. I'm a chemist.
- --
- _________________________________________________________________________
- Don't step on my blue suede .sig gezelter@lithium.cchem.berkeley.edu
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