Didymium

Name:
Didymium
Detailed information:
Di. Commercial mixture of rare-earth elements obtained from monazite sand by extraction followed by the elimination of cerium and thorium. The name is used like that of an element in naming mixed oxides and salts. The approximate composition of didymium from monazite, expressed as rare-earth oxides, is 46% La₂O₃, 10% Pr₆O₁₁, 32% Nd₂O₃, 5% Sm₂O₃, 0.4% yttrium earth oxides, 1% CeO₂, 3% Gd₂O₃, 2% others. Commercially used didymium salts are acetate, carbonate, chloride, fluoride, nitrate, etc.