Heat capacity and thermal conductivity of LiCl.7H<sub>2</sub>O
N Ahmad; C J Adkins; W A Phillips; N Ahmad; Cavenish Lab., Cambridge Univ., UK; C J Adkins; Cavenish Lab., Cambridge Univ., UK; W A Phillips; Cavenish Lab., Cambridge Univ., UK
Журнал:
Journal of Physics: Condensed Matter
Дата:
1993-06-14
Аннотация:
The heat capacity in the temperature range from 2 K to 20 K and the thermal conductivity in the temperature range from 2 K to 82 K of LiCl.7H<sub>2</sub>O cooled at a rate of 5 mK s<sup>-1</sup> has been measured. The general behaviour of both properties is very similar to that observed in other vitreous materials but there is no real evidence of the plateau region in the thermal conductivity of this material. The density of vibrational states has been determined from the heat capacity and it is non-quadratic in nature. The thermal conductivity data can be explained on the basis of scattering from point defect and tunneling states. About 40 atoms are participating in a tunnelling or soft mode.
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