Extraordinary temperature dependence of isochoric thermal conductivity of crystalline CO₂ doped with inert gases

• Published in: Физика низких температур
• Date: 2006
• Main Authors: Konstantinov, V.A., Manzhelii, V.G., Revyakin, V.P., Sagan, V.V.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2006
• Subjects: Cryocrystals
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120890
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Extraordinary temperature dependence of isochoric thermal conductivity of crystalline CO₂ doped with inert gases / V.A. Konstantinov, V.G. Manzhelii, V.P. Revyakin, V.V. Sagan // Физика низких температур. — 2006. — Т. 32, № 11. — С. 1414–1416. — Бібліогр.: 9 назв. — англ.

The isochoric thermal conductivities of solid (CO₂)₀,₉₀₅Kr₀,₀₉₅ and (CO2)₁₋xXex(x = 0.052 and
 0.097) solution of different densities was investigated in the temperature interval from 150 K to
 the onset of melting. An unusual effect of point defects on the thermal conductivity has been detected.
 In pure CO₂ at T >150 K the isochoric thermal conductivity decreases smoothly with increasing
 temperature. In contrast, the thermal conductivity of solid CO₂/Kr and CO₂/Xe solutions
 first decreases passing through a minimum at 200–210 K and then starts to increase with
 temperature up to the onset of melting. This behavior of the isochoric thermal conductivity is attributed
 to the rotation of the CO₂ molecules which gains more freedom as the spherically symmetrical
 inert gas atoms dissolve in CO₂.