Abstract:The manuscript discusses the lattice vibrations, optical, and mechanical characteristics of the zinc-blende AlP compound. Investigations have been done into the effect of temperature on refractive index, optical dielectric constant, static dielectric constant, longitudinal and transversal sound velocities, reflectivity, susceptibility, phonon frequencies, micro-hardness, ionicity, and transverse effective charge. The calculations in this article were carried out using the pseudo-potential method (EPM). Comparative analysis with the existing experiment and other theoretical calculations reveals a satisfactory level of agreement. The optoelectronic applications in the high pressure region could make use of the predicted properties.