Mass spectrometric study of molecular and ionic sublimation of lanthanum triiodide

Dunaev, A.M.; Kudin, L.S.; Motalov, V.B.; Ivanov, D.A.; Butman, M.F.; Krämer, Karl (2015). Mass spectrometric study of molecular and ionic sublimation of lanthanum triiodide. Thermochimica Acta, 622, pp. 82-87. Elsevier 10.1016/j.tca.2015.09.008

Text 253_Dunaev_TA_LaI3.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (461kB) | Request a copy

The molecular and ionic composition of saturated vapor over lanthanum triiodide was studied by Knudsen effusion mass spectrometry. The (LaI3)n molecules (n = 1–3) and the [I(LaI3)n]− ions (n = 0–4) were observed. The partial pressures of the molecules were determined and the enthalpies of sublimation, ΔsH° (298.15 K) in kJ mol−1, in the form of monomers (304 ± 7), dimers (428 ± 25), and trimers (455 ± 50) were obtained by the second and third laws of thermodynamics. The enthalpy of formation, ΔfH° (298.15 K) in kJ mol−1, of the LaI3 (−376 ± 10), La2I6 (−932 ± 25), La3I9 (−1585 ± 50) molecules and the LaI4− (−841 ± 24), La2I7− (−1486 ± 32) ions were determined. The electron work function, φe = 3.5 ± 0.3 eV, for the LaI3 crystal was calculated from the thermochemical cycle.

Interest & Impact

Downloads

1 since deposited on 22 Jan 2016
0 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item