• Citer

Mass spectrometric and knudsen-cell vaporization studies of group 2B-6B compounds

par Goldfinger, Paul ;Jeunehomme, Marie Paule
Référence Transactions of the Faraday Society, 59, page (2851-2867)
Publication Publié, 1963

Article révisé par les pairs

• Détails
• Contenu

Résumé :

The vaporization of the nine compounds of Zn, Cd and Hg with S, Se and Te has been investigated by mass spectrometry. The typical process is the decomposition into gaseous metal atoms and diatomic group 6B molecules. Small amounts of polymeric species of sulphur were observed in the vapour above HgS and considerable amounts of polymeric selenium molecules above HgSe; HgTe yields Hg(g) and solid Te. No gaseous group 2B-6B molecules were observed; their concentration is below 1 part in 103-105. Estimates of dissociation energies are made and the possibility of observing these molecules is discussed. Decomposition pressures of all nine compounds were measured by the Knudsen method and corresponding enthalpy and entropy data deduced and compared with literature data. The heat of vaporization of lead has been remeasured. The heats of atomization of the group 2B-6B compounds are compared with those of isosteric compounds and elements, and the trends are discussed.