co.lum.biten.(名词)A black, red-brown, or colorless mineral, essentially (Fe, Mn)(Nb, Ta)2O ', the principal ore of niobium. 铌铁矿:一种黑色的、红褐色或无色矿物,本质是(Fe, Mn)(Nb, Ta)2O ',是主要的铌矿 来源:columb(ium) columb(ium)-ite -ite