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Author Panish, M. B. ♦ Reif, L.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CHEMISTRY ♦ BOILING ♦ EVAPORATION ♦ IRIDIUM ♦ KNUDSEN EFFUSION ♦ PRESSURE ♦ RHODIUM ♦ TEMPERATURE ♦ VAPORS
Abstract The vaporization of iridium and rhodium was studied by Knudsen effusion and Langinuir evaporation techniques. The vapor pressure of iridium over the temperature range of 2100 to 2600 deg K is represented by the equation: logn/sub m//sub m/ = the temperature range of 2050 to 2200 deg K by the equation: logp/sub m//sub m/ = 0.28--(28300/T). Third-law analyses of the data yield the following heats of vaporization: iridium' DELTA H/sub 2//sub 9//sub 8/ = 158.4 plus or minus 0.5 kcal/mole; rhodium, DELTA H/sub 2//sub 9//sub 8/ = 132.8 plus or minus 0.3 kcal/ mole. Estimated boiling points for iridium and rhodium are 4800 deg and 3980 deg K, respectively. (auth)
ISSN 00219606
Educational Use Research
Learning Resource Type Article
Publisher Date 1961-06-01
Publisher Department Avco Corp., Wilmington, Mass.
Journal Journal of Chemical Physics
Volume Number 34
Organization Avco Corp., Wilmington, Mass.


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