Kerphalite™ KF (Hüttenes-Albertus Chemische Werke GmbH) is a natural material based on Andalusite. Andalusite was first identified in 1798 and named after the Spanish province, Andalusia, though later this location turned out to be untypical for the mineral. In terms of its chemistry, Andalusite is an aluminium silicate (Al2SiO5), which crystallizes in the orthorhombic crystal system and usually develops elongated, prismatic crystals with a square cross-section
