Rio Tinto has been holding talks to buy lithium miner Arcadium, three sources with direct knowledge of the negotiations said, a deal that would make Rio the third-largest producer of the electric vehicle battery metal.

Rio boss Jakob Stausholm has given investors every reason to believe reports that a lithium deal is imminent. No Rio Tinto shareholder should be surprised if a big lithium acquisition emerges this week from the takeover speculation based on the trail of breadcrumbs laid out by Rio chief Jakob Stausholm.

The Australian reported that Rio Tinto might be looking at M&A in the lithium space. That sent shares of Albemarle, Arcadium, and SQM higher.

Rio Tinto in talks to acquire Arcadium Lithium, potentially becoming the third-largest producer of EV battery metal.

Talks have been ongoing and continued in London this week during the LME Week conference, one of the sources said. An offer is expected to come in the near future, according to the second source. Talks are ongoing and may not necessarily result in a deal,

Australian listed mining giant Rio Tinto is in talks to buy the US-listed Arcadium Lithium in a deal shaping up to be worth at least $US4bn ($A5.9bn).

Potential major lithium acquisition by Rio Tinto Group has boosted industry stocks despite recent market decline. Explore more details here.

Rio Tinto Plc is said to be in talks to buy Arcadium Lithium Plc, in a deal that would value the smaller miner between $4 billion to $6 billion, Reuters reported, citing unnamed sources.