UPDATE 1-Russia's Prokhorov agrees to buy Kerimov stake in Uralkali
November 18, 2013 at 03:44 AM EST
MOSCOW, Nov 18 (Reuters) - Russian tycoon Mikhail Prokhorov agreed on Monday to buy Suleiman Kerimov's 21.75 percent stake in Uralkali, the world's largest potash miner, to try to calm tensions over the collapse of a sales cartel.
