allotrope

Activated charcoal has been used in hospitals to prevent poisons and drug overdoses, as the high surface area of the specific carbon allotrope in activated carbon prevents microscopic substances from being absorbed by the body.

The museum's Web site speculates that Cumberland locals first struck graphite some five centuries ago, when a violent storm uprooted trees and unearthed vast stores of the carbon allotrope.

Take all this stuff, for instance; especially their ability to transform iron into a fluid allotrope, and in that form to use its atomic—nuclear?—energy as power.

Black-lead—or, as we term it, graphite—of which I have several specimens here—is simply carbon—an allotrope of carbon—the same elementary substance, notwithstanding, as the diamond.

Take all this stuff, for instance; especially their ability to transform iron into a fluid allotrope, and in that form to use its intra-atomic energy as power.