Dalekanium bomb

From TARDIS Index File, the free Doctor Who reference.

A dalekanium bomb was a explosive capable of penetrating Dalek casings, discovered by Daleks in an alternate timeline in the 22nd century. The secret formula for it had been stolen from the Daleks by the human resistance. Shura brought a dalekanium bomb with him to the 20th century on the mission to kill Sir Reginald Styles. He instead used it to destroy the Daleks and Ogrons who had gathered at Auderly House, thus preventing his timeline from coming to pass. (DW: Day of the Daleks)

It is unlikely that the explosive is the same substance as the dalekanium used to make Dalek casings. The term itself was probably a neologism used to describe a product of the Daleks.