Type

Group

Subgroup

Species/Location/Formula

2:1

Clay

Smectite (Di)

Montmorillonite (SWy-2) (*)

Crook County, WY

Na_0.3Al_1.7Mg_0.3Si₄O₁₀(OH)₂

2:1

Clay

Smectite (Di)

Montmorillonite (SAz-1) (*)

Cheto Mine, Apache Country, AZ

Ca_0.3Al_1.6Mg_0.3Si₄O ₁₀(OH)₂

2:1

Clay

Smectite (Di)

Montmorillonite STx ? 1 (***)

county of Gonzales, Texas/USA

(Na,Ca)_0.33(Al,Mg)₂Si₄O₁₀(OH)₂・nH₂O

1:1

Clay

Kaolinite (Uni)

Kaolinite Kga-1 (**)

County of Washington, State of Georgia, USA

Al₂ Si₂O₅(OH)₄