Clay particle Any mineral in soils that is less than 2 microns in diameter
2:1 clay A category of clay minerals with sheet morphology (two Si tetrahedral
attached to one sheet of Al octahedral)
, Montmorillonite a 2:1 clay mineral that is a smectite
1:1 clay A category of clay minerals with one sheet of Si tetrahedra attached to
one sheet of Al octahedra
Allophane a poorly crystalline aluminosilicate formed in soils with volcanic ash input
Gibbsite an oxide mineral with Al in it
Clay mineral A category of minerals that have sheet morphology