list 5 main clay mineral

Clay minerals include the following groups:

Kaolin group which includes the minerals kaolinite, dickite, halloysite and nacrite.[1]
Some sources include the serpentine group due to structural similarities (Bailey 1980).
Smectite group which includes dioctahedral smectites such as montmorillonite and nontronite and trioctahedral smectites for example saponite.[1]
Illite group which includes the clay-micas. Illite is the only common mineral.[1]
Chlorite group includes a wide variety of similar minerals with considerable chemical variation.[1]
Other 2:1 clay types exist such as sepiolite or attapulgite, clays with long water channels internal to their structure