论文信息 - Thermochemical properties of the lithium cluster Li5

Thermochemical properties of the lithium cluster Li5

The existence of the stable lithium cluster Li5 has been proved experimentally by mass spectrometry. From the measurement of the gaseous equilibria Li5(g)+Li2(g)=Li4(g)+Li3(g) and Li5(g)+Li(g)=Li4(g)+Li2(g), an atomization energy D00(Li5) =110.0±2.5 kcal/mol was obtained. The ionization potential (IP) of Li5(g) was determined as IP(Li5)=4.56±0.3 eV, from which the atomization energy of the molecule ion Li+5, D00(Li+5) =130.0±5.0 kcal/mol is obtained for the reaction Li+5→Li++4 Li. The heat of formation was determined as ΔH00(Li5) =82.5±2.0 kcal/mol. By extrapolation from experimental results, the properties of neutral and ion clusters of hexamer lithium Li6 were predicted.

C. Wu

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