FeSiO4

Fayalite (FeSiO4) is an iron silicate ceramic belonging to the olivine mineral family, characterized by an orthosilicate crystal structure where isolated SiO4 tetrahedra are bonded through iron cations. This material naturally occurs in igneous rocks and synthetic forms are investigated for high-temperature structural applications, refractory use, and as a research compound for understanding olivine-family ceramics under extreme conditions. Engineers consider fayalite primarily for applications requiring thermal stability and chemical resistance in iron-rich environments, though its brittleness and limited ductility mean it competes with more conventional refractories and advanced ceramics in most industrial settings.