Al
Si
O
H
Ball and Stick
Stick
Spacefill
Polyhedral
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Dickite
Dickite, Al2Si2O5(OH)4, is a kaolin polymorph and, as such, is a 1:1 aluminous dioctahedral phyllosilicate (clay) mineral. It exhibits mica-like layers with silicate sheets of 6-membered rings bonded to aluminum oxide/hydroxide layers. The crystal structure displayed to the left is based on a Rietveld refinement derived from powder time-of-flight neutron diffraction data.
Highlighting Features
Planes of Si atoms Single silica tetrahedron Silica tetrahedral layers Planes of Al atoms Single aluminum octahedron Aluminum octahedral layers Single unit cell All atomsDistribution
As part of the kaolinite clay family, dickite is used in ceramics, as paint filler, rubber, plastics and glossy paper.
Bish, D.L., and C.T. Johnston, 1993. Rietveld Refinement and Fourier-Transform Infrared Spectroscopic Study of the Dickite Structure at Low Temperature. Clays and Clay Minerals. 41:297-304.