Ouahrani, TarikMerad Boudia, IBaltache, HKhenata, RBentalha, Z2013-04-212013-04-212011-080031-8949https://dspace.univ-tlemcen.dz/handle/112/1812PHYSICA SCRIPTA, ISSN : 0031-8949, DOI: 10.1088/0031-8949/84/02/025704, Issue : 2, Volume :84, AOUT 2011.The influence of pressure on the structural, elastic, thermal and bonding properties of four perovskite-type oxides AMO3 is studied from the point of view of the quantum theory of atoms in molecules. Ab initio investigations are performed by means of the full-potential linear augmented plane-wave method as implemented in the wien2k code. The integrated basin charges resulting from the topological analysis of electronic density provide a partition of the bulk modulus and compressibility into atomic contributions. Special attention is paid to the nonlinear behaviour of the local bonding properties.enArticle