niobium  search
BTmetals
 .niobium
UFcolumbium
 Nb
RTniobium ores
 high-field-strength elements
 tantalum
SNChemical element. Use niobium ores for niobium as a commodity.
niobium ores  search
BTmetal ores
 .niobium ores
RTpyrochlore
 columbite
 tantalum ores
 niobium