M.Phil. Crystal science strong seems self-evident; a strong is for the most part thought of as being hard and firm. Upon investigation, nonetheless, the definition turns out to be less clear. A shape of margarine, for instance, is hard subsequent to being put away in an icebox and is unmistakably a strong. Subsequent to staying on the kitchen counter for a day, a similar 3D shape turns out to be very delicate, and it is hazy if the margarine should in any case be viewed as a strong. Numerous