Cesium fluoride (CsF) is an ionic compound formed from fluorine and cesium, it is often present in white powder or crystal, has delixing properties, and is highly soluble in water, but not soluble in methanol. Although cesium fluoride is easily delixified, it can be easily restored by heating it in a vacuum for two hours. In addition, cesium fluoride is more easily dissociated than its similar compounds (such as sodium fluoride, potassium fluoride, etc.).