 Metal halide parafskites, MHPs, exhibit excellent properties for application in optoelectronic devices. However, the occurrence of phase transitions can affect their performance. Structural phase transitions are often influenced by phonon modes, which can be investigated using GIWACs and Raman spectroscopy. These techniques provide direct evidence for the existence of the gamma phase, while the other phases exist as averages over length and time scales within distinct temperature ranges. Furthermore, sound agreement between experimental and theoretical Raman spectra allows for identification of the Raman active phonon modes and investigation of their frequency as a function of temperature. This work increases our understanding of the structure and lattice dynamics of MHPs, such as CSPBBR3, and provides valuable insights into their potential applications. This article was authored by Alexander E. J. Hoffman, Rafiq Ali Saha, Sandra Borgmans, and others. We are article.tv, links in the description below.