What is Platonic crystal?
{{complex|date=April 2018}} '''Platonic crystals''' are periodic structures which are designed to guide flexural wave energy through thin elastic plates. The study of platonic crystals is referred to as ''platonics'' and does not refer to the teachings of [[Plato]] or the [[Platonic solids]]. Platonic crystals are also named after [[plate]], not [[Plato]]. The term is now used very commonly by many research groups in Australia, New Zealand, France, and the United Kingdom. {{-}} {{physics-stub}} [[Category:Physics]]