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High Pressure Phase Transition and Elastic Properties of AnAs (An = Th, U, Np, Pu) Compounds

BALWANT S. ARYA1,* , MAHENDRA AYNYAS2, SANKAR P. SANYAL3

Affiliation

  1. Department of Physics, Govt. Narmada College, Hoshangabad 461001, India
  2. Department of Physics, S.V. College, Bhopal 462030, India
  3. Department of Physics, University of Bhopal, Bhopal 462026, India

Abstract

We have investigated the structural phase transition and higher order elastic constants of actinide mono-arsenides (AnAs; An = Th, U, Np, Pu) by using a two body interaction potential with modified ionic charge. This method has been found quite satisfactory in the case of other Rare–Earth compounds. The calculated compression curves of actinide mono-arsenides have been compared with high pressure X-ray diffraction data. The theoretically predicted phase transition pressure and other structural properties for these compounds agree reasonably well with the measured values. We have also reported the second and third order elastic constants and second order pressure derivatives, for the fist time..

Keywords

Phase transition, Elastic properties, High pressure, Actinide arsenides.

Submitted at: April 13, 2009
Accepted at: April 28, 2009

Citation

BALWANT S. ARYA, MAHENDRA AYNYAS, SANKAR P. SANYAL, High Pressure Phase Transition and Elastic Properties of AnAs (An = Th, U, Np, Pu) Compounds, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 4, pp. 466-472 (2009)