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.  

Mica powder, a naturally occurring mineral, has gained significant popularity in the cosmetics industry due to its unique properties and versatility. Derived from the mineral mica, this fine, shimmering powder is a staple ingredient in a wide range of cosmetic products, offering both aesthetic appeal and functional benefits. In this article, we will explore the various aspects of mica powder in cosmetics, including its origins, applications, benefits, and the controversies surrounding its use.