ΔHf: -41.6 kcal/mol, REF: M. W. Chase, C. A. Davies, J. R. Downey, D. R. Frurip, R. A. McDonald, A. N. Syverud, JANAF Thermochemical Tables, Third Edition, J. Phys. Chem. Ref. Data 14, Suppl. 1 (1985). I.P.: 10.3 eV, REF: I. Novak, A. W. Potts, J. Electron Spect. Rel. Phenom. 33, 1 (1984).