Stilleite
Stilleite is a selenide mineral, zinc selenide, with the formula ZnSe. It has been found only as microscopic gray crystals occurring as inclusions in linnaeite associated with other selenide and sulfides. It was originally discovered in Katanga Province, Zaire in 1956 and is named for the German geologist, Hans Stille.
It has been reported from the Santa Brigida mine, La Rioja Province, Argentina and from Tilkerode ; and with tiemannite, clausthalite, eucairite, umangite, klockmannite in the Santa Brigida mine, Argentina.
