Nacrite
ID: nacrite
Al4[(OH)8.Si4O10]
Description
Nacrite is a phyllosilicate clay mineral characterized by the chemical formula Al2Si2O5(OH)4. It serves as a polytype of the kaolinite group, sharing an identical chemical composition while exhibiting a distinct monoclinic crystal structure. Due to its structural similarity to other kaolin-group minerals, diagnostic identification generally necessitates the utilization of X-ray diffraction techniques. In the context of ceramics, nacrite functions similarly to other kaolinitic materials, contributing to the plastic properties of clay bodies and serving as a fundamental source of alumina and silica in ceramic formulations.