The most popular synthetic method used for the growth of inorganic fluorides during the early 1960’s involved the combustion of simple reagents in a fluorine (F<sub>2</sub>) gas atmosphere. The fluorides prepared in this way tended to be highly unstable, and often exploded when handled. This was the primary reason fluorine chemistry was all but abandoned by the early 1970’s, which creates a gap in the understanding of fluorides. Hence, solid state fluorides is one of the areas where scientists interested in chemical and physical properties are confronted with the greatest difficulties in synthesis and characterization, as well as in safety requirements and where chemists mastering new preparation techniques feel the strongest call for new opportunities and synthetic breakthroughs.<br/><br/>In recent years, an increasing number of solid inorganic fluorides and oxy-fluorides have been studied. The more ionic nature of the fluoride and its single negative charge are its prominent difference from the oxides, which allows for obtaining materials with completely new architectures and properties. Furthermore, although the application of solid fluorides have remained relatively restricted, many developments can be achieved in different fields (e.g. related to optical, electrical, magnetic and energetic properties) like energy production and storage, microelectronics and photonics, catalysis, automotive etc. Hence, many research fields and applications are indeed concerned by a better knowledge of the relationships occurring between the structure of such compounds and some pertinent physical properties.

Crystal growth, structures and properties of inorganic fluorides and oxyfluorides

ACS Fall 2020 Virtual Meeting

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