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Thermal Expansion of Triglycine Sulphate

Abstract

Matthias, Miller and Remeika1 were the first to observe that triglycine sulphate becomes ferroelectric below 47° C. The dielectric properties and the specific heat of this crystal have been studied through the transition temperature by Hoshino, Mitsui, Jona and Pepinsky2. The observed variation of the dielectric properties as a function of temperature in this crystal shows that the transition is of second order. Hoshino et al. concluded that the anomaly is not of the λ-type, since their specific heat – temperature curve showed only a hump. It was decided to investigate the thermal expansion of this crystal as it might throw some light on the nature of the transition.

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References

  1. Matthias, B. T., Miller, C. E., and Remeika, J. P., Phys. Rev., 104, 849 (1956).

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  2. Hoshino, S., Mitsui, T., Jona, F., and Pepinsky, R., Phys. Rev., 107, 1255 (1957).

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  3. Wood, E. A., and Holden, A. N., Acta Cryst., 10, 145 (1957).

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  4. Hoshino, S., Okaya, Y., and Pepinsky, R., Phys. Rev., 115, 323 (1959).

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  5. Ubbelohde, A. R., and Woodward, I., Proc. Roy. Soc., A, 185, 448 (1946).

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GANESAN, S. Thermal Expansion of Triglycine Sulphate. Nature 185, 757–758 (1960). https://doi.org/10.1038/185757a0

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  • DOI: https://doi.org/10.1038/185757a0

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