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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.  

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colour shift pigment powder_chameleon mica flakes

Phlogopite mica is typically found in metamorphic rocks, particularly in ultramafic rocks such as peridotite and serpentinite. Major deposits of phlogopite mica are located in various parts of the world, including Russia, Canada, and the United States. The mining of phlogopite poses challenges, as large sheets are required for industrial use. However, the demand for this mineral has led to the establishment of careful extraction processes that mitigate environmental impacts.


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colour shift pigment powder_chameleon mica flakes