An alternative approach on the calculation of cohesive energy density and isothermal compressibility of alkali metal halides

ABSTRACT

In the present paper, new and useful theoretical methods for the estimation of cohesive energy density (Ced) and isothermal compressibility (k_T) of alkali metal halides are described. The mentioned theoretical methods include the use of Kaya molecular hardness equation published by us in recent years. Cohesive energy density and isothermal compressibility of alkali metal halides were calculated in the framework of mentioned theoretical methods and the results obtained were compared with both experimental data and the results of previous theoretical methods proposed to calculate the aforementioned quantities, namely cohesive energy density and isothermal compressibility. It is important to note that the results obtained in the study are in good agreement with the available experimental data and with the results of previous theoretical methods. Additionally, we also investigated the correlation with lattice energy of cohesive energy density and isothermal compressibility for alkali halides.

KEYWORDS:

• Chemical hardness
• cohesive energy density
• isothermal compressibility
• alkali metal halides

Acknowledgment

We thank Selen Unal for her help in the correction of English in the paper.

Disclosure statement

No potential conflict of interest was reported by the authors.