bn:03630977n
Noun Concept
Categories: Praseodymium compounds, Neodymium compounds, Misidentified chemical elements, Rare earth alloys
EN
didymium  didymium glass
EN
Didymium is a mixture of the elements praseodymium and neodymium. Wikipedia
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EN
Didymium is a mixture of the elements praseodymium and neodymium. Wikipedia
A mixture of the elements praseodymium and neodymium once thought to be an element Wikipedia Disambiguation
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