↑ Greenwood, Norman N.; Earnshaw, A. (1984), Chemistry of the Elements, Oxford: Pergamon, tr. 245, ISBN0-08-022057-6Quản lý CS1: nhiều tên: danh sách tác giả (liên kết) states, "Typical compositions for industrially used bauxites are Al2O3 40–60%, combined H2O 12–30%, SiO2 free and combined 1–15%, Fe2O3 7–30%, TiO2 3–4%, F, P2O5, V2O5, etc., 0.05–0.2%"
