Thermal Conductivity and Heat Capacity of Adamantane and Hexamethylenetetramine Under Pressure
- 20 April 1980
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 59 (1) , 137-148
- https://doi.org/10.1080/00268948008073505
Abstract
We have used the transient hot-wire technique to measure simultaneously the thermal conductivity and the heat capacity per unit volume of solid adamantane and hexamethylenetetramine. Data were obtained over the temperature range 115 K. to 445 K, and at pressures up to 2.5 GPa. The thermal conductivity of plastic crystalline adamantane is much less temperature dependent than those of normal crystalline adamantane and hexamethylenetetramine. The volume dependence of the thermal conductivity of plastic crystalline adamantane is considerably smaller than those of the normal crystalline phases, and thus more similar to that of a liquid. The molar heat capacities for the different phases and substances were found to change very little with pressure. We discuss the temperature and volume dependences of the thermal properties in relation to available theoretical models.Keywords
This publication has 15 references indexed in Scilit:
- Thermal conductivity and phase diagram of CCl4under pressureMolecular Physics, 1978
- Thermal conductivity and heat capacity of cyclopentane in the range 100–300 K and up to 2·1 GPaMolecular Physics, 1978
- Thermal conductivity and heat capacity of cyclohexane under pressureJournal of Physics and Chemistry of Solids, 1978
- Thermal conductivity of solids under pressure by the transient hot wire methodReview of Scientific Instruments, 1976
- Compressibility of 18 Molecular Organic Solids to 45 kbarThe Journal of Chemical Physics, 1971
- Compressibility and Melting Curve of Adamentane to 20 KbarMolecular Crystals, 1969
- Phase transition and crystal structures of adamantaneActa Crystallographica, 1965
- The crystal structure of hexam ethylenetetramine I. X -ray studies at 298, 100 and 34 °KProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963
- HEAT CAPACITIES AND THERMODYNAMIC PROPERTIES OF GLOBULAR MOLECULES. I. ADAMANTANE AND HEXAMETHYLENETETRAMINE1The Journal of Physical Chemistry, 1960
- Rough Compressions of 177 Substances to 40,000 Kg/CmProceedings of the American Academy of Arts and Sciences, 1948