... .05Ti0.002W0.003Ignition Loss, %, max0.2ApplicationFor niobium metal billets and powder, niobium carbide, ceramic GradeNb2O5Main content, % By substraction(exclusive of F, Ignition ... .001Ti0.0001V0.0001W0.0003Zr0.0001Ignition Loss, %, max0.1ApplicationFor lithium niobate single crystal and additive in special optical glass.