What is dislocation in the crystals

Define dislocation in crystals.

What are dislocations ?

What is dislocation and fracture of a bone?

What is dislocation defect? Why it is so called?

What is point defect in crystals ?

What are crystals?

What is meant by "water of crystallization" of a substance? Describe an activity to show the water of crystallization.

What are point defects in crystals ? Describe the Schottky defects in crystals.