The element europium is one of the most difficult to prepare as a stable shiny metal sample. It darkens in seconds on exposure to the air. We are therefore delighted to have found a way to manufacture these europium metal crystal samples permanently sealed under inert argon. 

The element europium is one of the most difficult to prepare as a stable shiny metal sample. It darkens in seconds on exposure to the air. We are therefore delighted to have found a way to manufacture these europium metal crystal samples permanently sealed under inert argon.