Ouahrani, TarikOtero De La Roza, AlbertoReshak, AhKhenata, RFaraoun, HiAmrani, BMebrouki, MLuana, Victor2013-06-062013-06-062010-09-010921-4526https://dspace.univ-tlemcen.dz/handle/112/1970Physica B: Condensed Matter, ISSN : 0921-4526, DOI : 10.1016/j.physb.2010.05.061, Issue : 17, Volume : 405, pp. 3658–3664, 1 September 2010.Full-potential linearized augmented plane waves (FPLAPW) calculations have been used to determine the equilibrium properties and elastic constants of the chalcopyrite phase of AgGaSe2. The topological analysis of the electron density shows a clear polar bonding, with the integrated basin charges revealing a clear dominance of the covalent over the ionic character. The bonding analysis also provides a partition of the bulk modulus and compressibility into atomic contributions. Se is seen to dominate the global behavior (B=51.2 GPa), with a local bulk modulus intermediate between the values of the other two atoms: 44.8 (Ga), 51.1 (Se), and 56.6 GPa (Ag).enFPLAPW calculationsElastic propertiesQuantum theory of atoms in moleculesChemical bonding in semiconductorsArticle