Question

Difference between crystalline and non-crystalline forms of carbon

Answer 1

For example, diamond and graphite are two crystalline forms of carbon, while amorphous carbon is a noncrystalline form. ... Polyamorphism is a similar phenomenon where the same atoms can exist in more than one amorphous solid form.

Answer 2

Crystalline solids have following characteristcs:

1.they have regular arrangement over along range.

2.the give clean cleavage when cut with knife.

3.they possess sharp melting point.

4.they are Anisotropic in nature i.e value of given property is different in all direction.

5.Example: Quartz

*Annealing :repeated heating and cooling of amorphous solid at a particular temperature to convert it into crystalline solid.

However if partcular temperature is not maintained it leads to the formation of milkyness called as Crystalloids.

*Amorphous solids have the following characteristics:

1.they have regular arrangement over a short range.

2.the give unclean cleavage when cut with knife.

3.they possess range melting point.

4.they are isotropic in nature i.e value of given property is same in all direction.

5.Example: QUARTZ GLASS

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