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# Allotropes of Carbon

The property of an element to exist in two or more physical forms having more or less similar chemical properties but different physical properties is called allotropy. The different forms of the element are called allotropes and are formed due to the difference in the arrangement of atoms. These allotropes of carbon are classified into two types. They are
• Crystaline forms
• Amorphous forms

Allotropes of carbon have received intensive attention because of their inherited physical fascination and the associated applications of bio-medicine, new material, electronics and energy research.

Amorphous forms :

The black residue left when carbon compounds are heated is called amorphous carbon . Different amorphous allotropes of carbon are

• Coal
• Coke
• Wood Charcoal
• Animal charcoal
• Lamp black
• Gas carbon
• Petroleum coke
• Sugar charcoal

## 3 Allotropes of Carbon

2. Graphite is composed of sp2 carbon forming an infinite planar layer ideally. Within a layer each carbon atom is chemically bonded to three other carbons by using 2px/y hybridized orbital and the un hybridized 2pz orbital of each carbon together forms delocalized $\pi$ bonds and results in fused stable hexagonal rings formation.