Mining giant Rio Tinto in talks to buy U.S. lithium producer Arcadium CNBCLithium miner Arcadium confirms Rio Tinto takeover approach Yahoo FinanceThese 3 Lithium Stocks Are Soaring Thanks to Mining Giant Rio Tinto Barron’sInvestor Tells Arcadium to Refuse a Low-Ball Rio Tinto Offer BloombergLive news: Rio Tinto makes approach to acquire Arcadium Lithium Financial Times