Allotrope or allotropism is the property of some chemical elements to exist in two or more different forms, known as allotrope of these elements. Allotrope are different structural modifications of an element; the atoms of the element are bonded together in a different manner. There are 8 types of allotrope's: a) Diamond
d) C60 (Buckminsterfullerene)
g) Amorphous carbon
h) single-walled carbon nanotube.