Verbeekite is a rare mineral consisting of palladium diselenide PdSe<sub>2</sub>. This transition metal dichalcogenide has an unusual monoclinic structure, with pairs of selenium atoms existing as dimers forming layers between palladium atom sheets. Unit cell dimensions are: , , , , . Palladium diselenide has five polymorphs. Verbeekite can be synthesised at 11.5 GPa pressure and 1300 ðC.
Monolayer PdSe<sub>2</sub> has been predicted as a semiconductor and synthesized as an electronic material.
The mineral was discovered in 2002 from the Musonoi Cu-Co-Mn-U mine (Kolwezi), in the Democratic Republic of the Congo. Verbeekite was named after geologist Théodore Verbeek who studied minerals at that mine between 1955 and 1967.