Which of the following mineral is non-expanding 2 : 1 type mineral
A. Montmorillonite
B. Beidellite
C. Nontronite
D. Illite
Answer: Option D
Solution(By Examveda Team)
IIIite is the non-expanding 2 : 1 type mineral among the following given options.Illite is a group of closely related non-expanding clay minerals. It is a secondary mineral precipitate and an example of a phyllosilicate, or layered alumino-silicate.
Its structure is a 2 : 1 sandwich of silica tetrahedron (T) - alumina octahedron (O) - silica tetrahedron (T) layers.
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