The mineral chlorite has an extra layer of

A. Brucite

B. Illite

C. Gibbosite

D. Montomorillonite

Answer: Option B

Solution(By Examveda Team)

The mineral chlorite has an extra layer of Illite. The illite is abundant throughout the illite-chlorite predominant zone. Layers of illite and chlorite are semicoherent.
The chlorites are a group of phyllosilicate minerals common in low-grade metamorphic rocks and altered igneous rocks.