Frontmatter -- Inhalt des 15. Bandes -- Contents -- 1. Introduction -- 2. Preliminary Notions. Definitions and Notations -- 2.1. Gaseous Mixtures -- 2.2. Molecular Models -- 2.3. Thermal Diffusion Effect -- 3. Thermal Diffusion and Molecular Models -- 3.1. Rigid Elastic Sphere Model -- 3.2. Inverse Power Model -- 3.3. Square-Well Molecular Potential Model -- 3. 4. SUTHERLAND Model -- 3. 5. LENNARD-JONES Model -- 3. 6. Modified BUCKINGHAM or exp (— 6) Model -- 4. Theoretical and Experimental Results. Concrete Cases -- 4.1. Hydrogen -- 4.2. Helium -- 4.3. Boron -- 4.4. Carbon -- 4.5. Nitrogen -- 4.6. Oxygen -- 4.7. Neon -- 4.8. Chlorine -- 4.9. Argon -- 4.10. Krypton -- 4.11. Xenon -- Acknowledgments -- References -- Backmatter