In the ‘Avatar’ movies, what is the name of the rare-earth compound that becomes the source of conflict on Pandora?

In the ‘Avatar’ movies, what is the name of the rare-earth compound that becomes the source of conflict on Pandora?

A Duranium
B Frinkonium
C Unobtanium

Unobtanium is a valuable mineral found on Pandora, which prompts a group of humans to launch an attack on the moon and its local inhabitants called the Na’vi.

The correct answer is Unobtanium.