Tags: Chemical Substance, Mineral.
Rheniite is a very rare rhenium sulfide mineral (ReS2). It forms metallic silver grey platey crystals in the triclinic – pinacoidal class. It has a specific gravity of 7.5.It was discovered at the Kudriavy Volcano Iturup Island in the Kurile Islands Russia and approved in 2004. It is found in active hot fumaroles on the volcano.Rheniite is the first mineral of the element rhenium to be found. The second known approved rhenium mineral is tarkianite being also a sulfide.
