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https://desdelamediterrania.cat/2015/01/29/els-empedocles-moderns-bernard-courtois-1811-i-lelement-53-i-iode-nilpentitri-npt/
Els empèdocles moderns – Bernard Courtois (1811) i l’element 53 (I) – iode (nilpentitri, Npt)