Dunaev, A.M.A.M.DunaevKudin, L.S.L.S.KudinMotalov, V.B.V.B.MotalovIvanov, D.A.D.A.IvanovButman, M.F.M.F.ButmanKrämer, KarlKarlKrämer0000-0001-5524-77032024-10-232024-10-232015https://boris-portal.unibe.ch/handle/20.500.12422/137117The 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.en500 - Science::570 - Life sciences; biology500 - Science::540 - Chemistryarticle10.7892/boris.7468610.1016/j.tca.2015.09.008