Verbeekite is a rare mineral consisting of palladium diselenide PdSe2.
This transition metal dichalcogenide has an unusual monoclinic structure, with pairs of selenium atoms existing as dimers forming layers between palladium atom sheets.
[1] Monolayer PdSe2 has been predicted as a semiconductor and synthesized as an electronic material.
[2][3] 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.