Clausthalite is a lead selenide mineral, PbSe.

It forms a solid solution series with galena PbS.

It is associated with tiemannite, klockmannite, berzelianite, umangite, gold, stibiopalladinite and uraninite.

[3] It was first described in 1832 and named for the discovery locality of Clausthal-Zellerfeld in the Harz Mountains, Germany.

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