Russian President Dmitry Medvedev has signed a law on forming a joint venture with Mongolia to develop a large uranium deposit.
Medvedev's signature clears the way for creation of the Russian-Mongolian company Dornod Uran to develop Mongolia's Dornod field with reserves of at least 28,000 tons of uranium.
Russia's state nuclear company, Rosatom, has also pledged to help with infrastructure in Mongolia, such as new railway lines, to facilitate work at Dornod.
Rosatom has been negotiating with the Mongolian government for months to reach this agreement.
It remains unclear how soon work can start since Canada's Khan Resources still claims it is the rightful owner of 58 percent of Dornod and has been fighting in court to retain this stake.