Which of the following is/are the crystalline form/s of carbon?
Diamond
Graphite
The different allotropes of Carbon can be classified in the following two categories:
Crystalline:
1. Diamond
2. Graphite
3. Fullerene
Amorphous:
1. Coke
2. Charcoal
3. Carbon black
So, Diamond & Graphite are the crystalline forms of carbon.