Definition of gibbsite in English:



mass noun
  • A colourless mineral consisting of hydrated aluminium hydroxide, occurring chiefly as a constituent of bauxite or in encrustations.

    • ‘‘This particular sample is a cryptocrystalline stalactitic aggregate, composed of concentric layers of gibbsite of variable purity.’’
    • ‘Its structure is predicted from the known structures of nordstrandite and gibbsite on the basis of similarities in X-ray precession photographs in two zones.’
    • ‘The Al concentration is adapted to equilibrium with gibbsite.’
    • ‘Only detailed sampling of early weathering stages combined with suitable analytical techniques can reveal the presence of gibbsite as a primary weathering product in certain weathering crusts of acid igneous rocks.’
    • ‘The remaining clay component from the limestone can be further altered by these acids and, over time, it is converted to aluminium oxyhydroxide minerals such as gibbsite, diaspore, and boehmite.’


Early 19th century: named after George Gibbs (1776–1833), American mineralogist, + -ite.