Knowledge of Crystal Structure
Pp. 8-16 (9)
Crystalline and Amorphous States
Laue’s discovery of X-ray diffraction demonstrated that very few solids are amorphous. Materials such as the rocks
and soil, metals and alloys, wood, concrete, and even textile fibers are crystalline, at least partly. Rubber becomes
crystalline when being stretched, and even bones, hair, muscle fibers, and tendons of animal body are partly
crystalline. The most reliable means of demonstrating this crystalline nature is the X-ray diffraction technique.
Using X-ray examination, at least 95% of solid inorganic chemical substances are found to be crystalline, and more
than 98% of minerals show definite crystalline structure [8-11].....