What are Crystalline and Non-Crystalline materials?

Hello aditya goyal

Is this a homework or Class Question?

Kind Regards....

A number of on-line encylcopaediae can give a comprehensive insight into this question.

Within a crystallizer, anything solid that forms and can be filtered out is generally considered 'crystalline'. Anything that is left is generally considered 'not crystalline'. Crystals usually form when you cool, adjust the pH or otherwise evaporate the mother liquor.

Quick reply: Most materials are crystalline in solid state, Some notable exceptions are polymers (rubber) and Glasses. Salts, metals, gemstones, proteins all have crystalline structure.

Many natural materials are not crystalline (wood).

You might find Stephen L Sass's "the substance of Civilization" a good read.

http://www.amazon.com/review/R1XMIK9P8WBSCH

So the real question implied is what do you mean when you say "Materials?"

milo