@article{3073333, title = "A tentative model for estimating the compressibility of rock-salt AgCl xBr1-x alloys", author = "Katsika-Tsigourakou, V. and Skordas, E.S.", journal = "Pramana - Journal of Physics", year = "2013", volume = "80", number = "2", pages = "307-313", doi = "10.1007/s12043-012-0466-3", keywords = "Defects in solids; Density-functional perturbation theory; Elastic properties; Full potential linearized augmented plane wave method; Isothermal compressibility; Mixed crystals; Theoretical models; Virtual crystal approximation, Alloys; Calculations; Compressibility; Point defects; Silver halides, Cerium alloys", abstract = "Ab initio detailed calculations of the elastic properties of AgCl xBr1-x alloys were recently made using density-functional perturbation theory and by employing the virtual crystal approximation or by means of the full potential linearized augmented plane wave method. Here, we suggest a simple theoretical model that enables estimation of isothermal compressibility of these alloys in terms of the elastic data of end-members alone. The calculated values are in satisfactory agreement with the experimental ones. The present model makes use of an early suggestion that interconnects Gibbs energy for the formation and/or migration of defects in solids with bulk properties. © Indian Academy of Sciences." }