Andalusite

Description

Andalusite is a naturally occurring aluminium nesosilicate mineral characterized by the chemical formula Al2SiO5. Within the field of ceramics, it is valued primarily as a low-expansion alumina silicate material. Its unique thermal properties make it a significant additive in high-temperature applications where volume stability is critical. While originally misidentified by Delamétherie as originating from the Spanish region of Andalusia—a label based on a geographical error regarding its discovery in Guadalajara—the mineral remains a distinct and stable crystalline component in ceramic science.