Imports In 1997, Niger imported $934 in Niobium, tantalum and vanadium ores and concentrates, becoming the 0th largest importer of Niobium, tantalum and vanadium ores and concentrates in the world. At the same year, Niobium, tantalum and vanadium ores and concentrates was the 0th most imported product in Niger. Niger imports Niobium, tantalum and vanadium ores and concentrates primarily from: N/A.