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Thermal Study of the Phase Transitions in Potassium Hydrogen Sulphate KHSO_{4}

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Tahoon K. K., Abosehly A. M., Abdel-Kader M. M., El-Sharkawy A. A., El-Mansi F. M.

Acta Physica Polonica A

1994

vol. 86

issue 3

349-355

We report on some thermal properties (specific heat capacity C_{p}, thermal conductivity λ, and thermal diffusivity σ) in addition to the differential thermal analysis thermogram and thermogravimetric analysis for potassium hydrogen sulphate (KHS), KHSO_{4}. The accurate measurements of the above-mentioned parameters as functions of temperature revealed that the compound undergoes two structural phase transitions around 100°C and 175°C. It seems also likely that the compound behaves as a poorly conducting material and hence the maul mechanism of the heat transfer is due to phonons. The data are correlated to the crystal structure including the two different HSO¯_{4} ions.

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1 Acta Physica Polonica A

1 1994

1 Abdel-Kader M. M.

1 Abosehly A. M.

1 El-Mansi F. M.

1 El-Sharkawy A. A.

1 Tahoon K. K.

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Thermal Study of the Phase Transitions in Potassium Hydrogen Sulphate KHSO_{4}