Study on sublimation of solid electrolyte (AgI)0.5-(AgPO3)0.5 with Knudsen effusion mass spectrometry

Ugo Bardi; Stefano Caporali; Alexander Tolstogouzov

doi:10.1002/rcm.3865

Study on sublimation of solid electrolyte (AgI)0.5-(AgPO3)0.5 with Knudsen effusion mass spectrometry

Rapid Commun Mass Spectrom. 2009 Jan;23(1):147-50. doi: 10.1002/rcm.3865.

Authors

Ugo Bardi¹, Stefano Caporali, Alexander Tolstogouzov

Affiliation

¹ Department of Chemistry, University of Florence, Sesto Fiorentino (FI), Italy.

PMID: 19061208
DOI: 10.1002/rcm.3865

Abstract

Knudsen high-temperature mass spectrometry was used to study the process of sublimation of a solid electrolyte (AgI)(0.5-)(AgPO(3))(0.5). Monoatomic iodine ions were found to be the dominant species in the electron ionization mass spectra below 600 degrees C. With an increase in temperature, the relative content of phosphorus oxide ions, mainly [PO](+) and [P(4)O(10)](+), increased. Under further heating, we observed silver iodide and iodine dimer ions together with phosphorus dimer and tetramer ions and clusters [IPO(2)](+), [IP(2)](+), [I(3)P](+). Using the experimental logarithmic dependencies of ion signal intensities versus the reciprocal absolute temperature of the effusion cell, the apparent sublimation enthalpies Delta(s)H of the ions giving the most intense signals were estimated.