Insights into the High-Pressure Behavior of AWO ₄ -Type Orthotungstates

Pressure-induced phase transitions in orthotungstates have resulted in intriguing physical phenomena. The transitions that are observed typically involve significant volume reductions and substantial alterations in the electronic and vibrational characteristics of the materials. In this feature article, we examine the existing knowledge regarding the behavior of AWO₄ tungstates when subjected to compression. Specifically, we provide a summary of research on their structural and electronic properties, along with several illustrative examples of high-pressure investigations in the relevant compounds. A comprehensive understanding of the high-pressure behavior of AWO₄ compounds is offered, with a focus on findings that may be pertinent for practical applications. Recent developments and future challenges in the study of orthotungstates under extreme pressure are discussed, along with conclusions that may impact such study. Additionally, some suggestions for topics that could lead to significant breakthroughs will also be presented.