Vovoka mifototra amin'ny niobium ambany-oxygen hafa.

Ny orinasa dia nametraka famatsiana famokarana betsaka an'ny tantalum-2.5% tungsten, tantalum-5.5% tungsten, tantalum-7.5% tungsten, ary tantalum-10% vovoka tantalum-tungsten, ary koa C103, Nb521, vovoka tantalum-niobium, tantalum-niobium-titanium alloys, niobium-tungsten-molybdenum-vanadium alloys, tantalum-titanium alloys, ary niobium-tungsten-molybdenum-zirconium-hafnium vovoka.