Example Sentences

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Phosphorus is the only member of its group that does not occur in the uncombined state in nature; it exists in many allotropic forms.

From Textbooks • Feb. 14, 2019

"For the creation of quantum mechanics, the application of which has, inter alia, led to the discovery of the allotropic forms of hydrogen."

From US News • Oct. 10, 2014

The elements even have allotropic forms corresponding very closely to those of sulphur.

From An Elementary Study of Chemistry by McPherson, William

Are lampblack and bone black allotropic forms of carbon?

From An Elementary Study of Chemistry by McPherson, William

It occurs in several allotropic forms, is very hard when crystallized, and is rather inactive toward reagents.

From An Elementary Study of Chemistry by McPherson, William