1992/08/01 by P. D. Kleinschmidt, K. H. Lau, D. L. Hildenbrand · 2 citations
Chemistry · Materials Science · Engineering · #Inorganic Fluorides and Related Compounds #Catalytic Processes in Materials Science #Gas Sensing Nanomaterials and Sensors
paper · doi:10.1063/1.463131
openalex publication_date 1992/08/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
The sublimation reaction NpF4(s) = NpF4(g) was measured over the range 820–980 K using Knudsen effusion mass spectrometry. The ionization potential of NpF4(g) is 10.4 +/−0.3 eV. The enthalpy of sublimation from second law analysis is 288.1+/−10.0 kJ mol−1, while the second law entropy of sublimation is 199.1+/−11.0 J K−1 mol−1, both at 298 K. The calculated enthalpy of formation of NpF4(g) is −1585.9+/−17.0 kJ mol−1 and the entropy is 351.8+/−12.0 J K−1 mol−1 at 298 K.