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• Extraction of yttrium and rare-earth elements from Arizona euxenite concentrate
• Extraction of yttrium and rare-earth elements from a euxenite carbonate residue
• Extraction of rare-earth elements from bastnaesite concentrate
• Metathesis of bastnasite and solvent extraction of cerium
• Extraction and separation of rare-earth elements in Idaho euxenite concentrate
• Extraction of euxenite metal values by fusion with ammonium sulfate or ammonium bisulfate