… Niobium, tantalum, vanadium or zirconium ores and concentrates. …
Explanatory notes
… 26.15 ‑ N iobium, tantalum, vanadium or zirconium ores and concentrates. 2615.10 ‑ … classified in this heading are : (a) Descloizite, basic vanadate of lead and zinc. (b) Patronite, vanadium … sulphide. (c) Roscoelite (vanadium mica), complex vanado‑silicate of aluminium and magnesium. (d) …