X { Y2-3 [Z4O10] (OH)2 }

Mica is a new non-metallic crystal material, a national key new material, with heat insulation, insulation, high temperature resistance characteristics, is an important material in aerospace, rail transit, nuclear power, wind power, aircraft carriers and other high-tech fields, but also electrical equipment, wire and cable, household appliances indispensable insulation material, in the national economy and national defense construction plays an important role.

In addition to electronics, mica is also a critical ingredient in the cosmetics industry. It is commonly found in makeup products, such as eyeshadows, highlighters, and foundation, where it serves multiple purposes. Mica provides a shimmering effect, enhancing the appearance of the skin and creating a luminous finish. Moreover, its absorbent properties help to control oil, making it a popular choice for products designed for oily or combination skin types. As consumers become more conscious of the ingredients in their cosmetics, the demand for natural and mineral-based products has surged, further boosting the mica market.

X represents large interlayer cations, such as K+, Na+, Ca2+, Ba2+, Rb+, Cs+, etc. Y represents octahedral cations, such as Al3+, Fe2+, Mg2+, Cr3+, Ti4+, Fe3+, etc. Z is mainly Si4+ and Al3+; The ideal ratio of the additional anion (OH)- to (O)2- is 2:10, and (OH)- can be replaced by F- and Cl-. Most mica contain 4% to 5% water. Therefore, although they may be called mica, the chemical composition of different mica may be very different, for the purpose of research, we collectively refer to the minerals with this type of characteristics as mica group minerals.