ILLIT

ILLIT refers to a type of clay mineral that is a member of the illite family, which is a group of phyllosilicate minerals. Illite is typically defined by its 2:1 layer structure, which consists of two tetrahedral sheets and one octahedral sheet. It is predominantly found in sedimentary rocks and soil, where it forms from the alteration of other minerals and is stable under moderate temperatures and pressures. Illite is commonly associated with clay deposits and is important in various geological processes, including the formation of soil and the alteration of volcanic rocks. Its physical properties include a flaky structure and a tendency to retain water, making it a significant component in agriculture and environmental studies.