A silica comprising at least two silica fractions, wherein said at least two silica fractions differ by at least 10% in at least one value for BET surface area, CTAB surface area and DBP absorption, the ranges of these three physicochemical properties being as follows: BET surface area 100-900 m2/g, CTAB surface area 100-500 m2/g, DBP absorption 150-350 g/100 g.

 
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< Aluminum hydroxide, made via the bayer process, with low organic carbon

> Material demonstrating negative or low thermal expansion coefficient and method for manufacture thereof

> Framework assisted crystal growth
~ 00218