Accession Number : AD0449634


Title :   INFRARED SPECTRA BY MULLING TECHNIQUES AT LIQUID-NITROGEN TEMPERATURES,


Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY


Personal Author(s) : Bertie, J. E. ; Whalley, E.


Report Date : 10 FEB 1964


Pagination or Media Count : 8


Abstract : For some materials, the more usual spectroscopic sampling techniques are inadequate or fail completely. Some examples of these materials are as follows: high-pressure phases, such as the high-pressure ices, that are metastable at atmospheric pressure only well below room temperature; compounds that can be prepared only under an appreciable pressure of gas but that are stable or metastable at low temperatures, for example some gas hydrates; low melting solids that form a vitreous phase at low temperatures that is difficult to devitrify; low-temperature solids that have several crystalline phases that may not be easily made reproducibly because of slow or irreproducible transformation rates. An experimental technique is described fnr making spectroscopic mulls near liquid-nitrogen temperatures. (Author)


Descriptors :   *INFRARED SPECTROSCOPY, *PHASE STUDIES, ABSORPTION SPECTRA, MOLECULAR SPECTROSCOPY, HYDROCARBONS, HALOGENATED HYDROCARBONS, LABORATORY EQUIPMENT, ICE, CANADA.


Distribution Statement : APPROVED FOR PUBLIC RELEASE