Two examples of typical crystal structures of common clay minerals: (a) montmorillonite, a 2 : 1 type
smectite with layers consisting of two tetrahedral sheets and one octahedral sheet with layers separated
by the interlayer space with hydrated cations; (b) kaolinite, a 1 : 1 type clay mineral with layers consisting
of one tetrahedral and one octahedral sheet. https://www.mdpi.com/ 2075 - 1729 / 12 / 2 / 259
Scanning Electron Micrograph Showing Plates of the Clay Mineral Kaolin
https://environmental-geology-dev.pressbooks.tru.ca/wp-content/uploads/sites/ 73 / 2021 / 07 /Clay-
SEM.png