from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white to dark reddish-brown orthorhombic mineral, AlO(OH), present in bauxite.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mixed oxide and hydroxide of aluminium.
It consists largely of the minerals gibbsite Al (OH) 3, boehmite γ-AlO (OH), and diaspore α-AlO (OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.
These minerals are gibbsite (Al (OH) 3), diaspore (AlO (OH)), and boehmite (AlO (OH)).