Rio Tinto Ltd (LSE:RIO, ASX:RIO, OTC:RTNTF) is spending nearly 7billiontoacquirediverselithiumcompanyArcadiumLithium,asignofconfidenceinthelong−termdemandforlithium.Earlierthisweek,RioTintoannounceditsplantoacquireArcadiumLithiumPLC(NYSE:ALTM,ASX:LTM)inanall−cashtransactionvaluedat5.85 per share, representing a 90% premium to Arcadium's recent closing price. The deal, which values Arcadium at approximately $6.96 billion in enterprise value, underscores Rio's strateg ...