1) Lead mineral
Found on
https://www.crosswordclues.com/clue/clausthalite
Clausthalite is a lead selenide mineral, PbSe. It forms a solid solution series with galena PbS. ==Occurrence== It occurs in low-sulfur hydrothermal deposits with other selenides and in mercury deposits. It is associated with tiemannite, klockmannite, berzelianite, umangite, gold, stibiopalladinite and uraninite. It was first described in 1832 and...
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http://en.wikipedia.org/wiki/Clausthalite
Lead selenide
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http://www.translationdirectory.com/glossaries/glossary075.htm
a rare mineral, lead selenide, PbSe, occurring in grayish, granular crystals that have a metallic luster.
Found on
https://www.infoplease.com/dictionary/clausthalite
No exact match found.
