A commercial surface area analyzer and Calvet-type microcalorimeter were combined for measurements of heats of gas–solid interactions, providing enhanced resolution, flexibility, and throughput compared to conventional methods. Integral adsorption enthalpies for half monolayer coverage on and surfaces were found to be in the range and per mole of gaseous for differently prepared monoclinic phases and and for tetragonal phases from precipitation. The surface enthalpy for anhydrous tetragonal was derived as from water adsorption and high-temperature solution calorimetry data.
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© 2005 American Institute of Physics.
2005
American Institute of Physics
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