The PHEMTRONICS project database (D2.7) provides an account of the structural and optical properties and some thermodynamic data of the novel phase-change materials Gallium sulfide (GaS) and Antimony sulfide (Sb2S3), in their amorphous and polycrystalline states. This database, informed by data obtained through spectroscopic ellipsometry and Raman spectroscopy, consists of optical properties of these materials at room temperature and the temperature dependence of those optical properties determined by in-situ ellipsometric monitoring of heating experiments. In addition, the database also contains Raman spectra as structural information. This resource aims to assist researchers and engineers working with phase change materials and contributes to the development of advanced optical devices, aligning with the goals of the PHEMTRONICS project.