Nkọwa: A naghị ejikọta kristal nke ụrọ montmorillonite nke ọma, ya mere mmiri nwere ike itinye aka, na-eme ka ụrọ ahụ na-ebuwanye ibu. Mmiri nke montmorillonite na-agbanwe agbanwe ma ọ na-abawanye nke ukwuu mgbe ọ na-amịkọrọ mmiri. Chemically, ọ bụ hydrated sodium calcium aluminium magnesium silicate hydroxide (Na,Ca) 0.33 ((Al,Mg) 2 ((Si4O10) ((OH) 2·nH2O. Potassium, iron, na cations ndị ọzọ bụ ihe nnọchianya nkịtị, na kpọmkwem nke cations dịgasị iche iche na isi iyi. Ọ na-emekarị na-agwakọta ya na chlorite, muscovite, illite, cookeite, na kaolinite. Ajụjụ: Gịnị bụ ụfọdụ ihe nnọchianya?
Potassium, iron, na cations ndị ọzọ