Optical measurements of vapor pressures of Rb and a Rb–K mixture

Abstract
Vapor pressure measurements of Rb and of a Rb–K solution have been made by the equivalent width method in the 400–520 K temperature range. The pure Rb results agree well with existing data and the analytic approximation of Nesmyanov. For the Rb–K solution, the Rb partial pressure data agree well with expectations based on theoretical and experimental heats of mixing, but the data for K do not.

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