These materials are then called hydrogenated amorphous carbon.

The three relatively well-known allotropes of carbon are amorphous carbon, graphite, and diamond.

Unlike diamond, however its structure is that of amorphous carbon so its hardness may be isotropic.

Note that glassy carbon should not be confused with amorphous carbon.

Coal and soot or carbon black are informally called amorphous carbon.

There is also amorphous carbon, which is carbon without any crystalline structure.

Their analysis suggests that the walls contain 10-30% of ordered material covered with amorphous carbon.

The hardest, strongest, and slickest is such a mixture, known as tetrahedral amorphous carbon, or ta-C.

In the west, manufacturers use amorphous carbon or organic charcoal instead of lead.

Soot is a powder-like form of amorphous carbon.