Cristobalite: dazzling white

Cristobalite is a high temperature modification of silica. In contrast to silica cristobalite is rarley existent in nature. Therefore cristobalite is made out of pure silica by heating it up to 1.500°C. Through this calcining-process the lattice is expanded and the density is reduced to 2.35 g/cm³. The thereby generated air bubbles lead to a negative refractive index and an outstanding brightness. Like silica cristobalite is chemically inert. Products from medium grain sizes from 300 µm down to micronized powders with only 1m are available.



• hardness 6.5 (Mohs)
• density 2.35 g/cm³
• high brightness (Y > 94)
• high chemical resistance
• thermal expansion: 54*10-6/K ( at T 20-300°C)


Key applications:

• dispersion outdoor paints and plasters
• engineered stone made of PMMA, UP
• road markings
• antiblocking-additives in PP- and PE-films
• dental casting material
• silicone sealants
• precision casting


High Performance Fillers based on cristobalite: