Under the deals with Evolution Energy Minerals, Ecograf Ltd, and Peak Rare Earths, Tanzania will have a 16% stake each in jointly established companies to operate the projects, said Palamagamba Kabudi, the chairman of the government's negotiating team.
Rare earths are a group of 17 minerals used in consumer electronics, electric vehicles, smart phones, renewable energy and military equipment.
Under Tanzania's agreement with Peak Rare Earths, the minerals will be mined in the southwest of the country in Ngualla.
Kabudi said Evolution Energy Minerals and Ecograf would mine graphite in southern and eastern Tanzania. Ecograf will also mine for the mineral in the north.
Graphite is a mineral used for the negative end of a lithium-ion battery, known as the anode. Around 70% of all graphite comes from China, and there are few viable alternatives for batteries.
The U.S. government and allies including Australia, which has some of the world's largest rare earths producers outside of China, are scrambling to reduce their reliance on China.
