Note to reader Milling is an important technology which has a wide range of potential applications in many different fields. It can be applied in different ways to any type of compound. Its effects range from obtaining nano-particles to chemical synthesis, from the increase in reactivity to the forced formation of alloys. In all cases, changes in the physical state, in the form of polymorphic modification between crystalline varieties, amorphization etc. may occur during milling. The accidental formation of these new states can dramatically affect the stability and expected performance...