Explanatory notes
… ‑ Thorium ores and concentrates The principal uranium ores generally classified in this heading are : (a) Autunite, hydrated phosphate of uranium and calcium. (b) Brannerite, uranium titanate. (c) Carnotite, hydrated … Pitchblende and uraninite, saline uranium oxides. (h) Torbernite (or chalcolite), hydrated phosphate of uranium …