
1) Sulfide mineral 2) Triclinic mineral
Found on
https://www.crosswordclues.com/clue/rheniite

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 th...
Found on
http://en.wikipedia.org/wiki/Rheniite
(Rhenium Sulfide) Rheniite is a very rare and a very new mineral on the mineral market. It is so new that it is not yet listed in mineral indexes. It is found at the Kudriary Volcano, Iturup Island, Russia and is the only known rhenium mineral. Rhenium has been found as a trace element in columbite , molybdenite , gadolinite ...
Found on
https://www.encyclo.co.uk/local/23719
No exact match found.