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Effect of pressure on the valency of cerium in cerium monochalcogenides and cerium monopnictides

Authors:

Md. Tarek Hossain,

BD
About Md. Tarek
Department of Physics, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh.
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Abdul Hannan ,

BD
About Abdul
Department of Physics, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh.
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Sultana Rokeya Parvin

BD
About Sultana
Govt. Agragami Girls’ High School and College, Sylhet, Bangladesh.
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Abstract

Application of pressure on a material changes its properties due to the modification of the electronic states of the constituent atoms. Various effects of pressure on the properties of solid material have been identified, and valency change of an element in a compound is one of the effects of pressure. This study was aimed at finding the valency change as a function of pressure of some compounds. The valency changes of cerium in cerium monochalcogenides CeX (X = O and S) and cerium monopnictides CeX (X = P and As) as functions of pressure have been calculated utilising the reported data. For calculating the valency change of Ce, the reported experimental pressure-volume relationships of CeO, CeS, CeP and CeAs have been reproduced using the Birch equation of state. The corresponding pressure-volume relationships of these compounds for stable trivalent cerium have also been calculated using the same Birch equation. The change in valency is calculated by a technique, which considers the difference between the calculated and experimental lattice parameters at each pressure value of the concerned compound. Clear effect of pressure on the cerium valency has been obtained for each compound from the present calculation.

J.Natn.Sci.Foundation Sri Lanka 2015 43 (4): 313 - 317

How to Cite: Hossain, M.T., Hannan, A. and Parvin, S.R., 2015. Effect of pressure on the valency of cerium in cerium monochalcogenides and cerium monopnictides. Journal of the National Science Foundation of Sri Lanka, 43(4), pp.313–317. DOI: http://doi.org/10.4038/jnsfsr.v43i4.7966
Published on 26 Dec 2015.
Peer Reviewed

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