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Cristobalite
CAS number: 14464-46-1
Cristobalite is defined as a high-temperature polymorph of silica that typically occurs in volcanic rocks, exhibiting structural transformations under varying pressure conditions, including a transition to lower symmetry phases or amorphization at high pressures.

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Derivatization of organic dyes for incorporation into silica matrices.
Derivatization of organic dyes for incorporation into silica matrices.
Photoluminescence spectra and photographs of 50 nm-sized, dye-doped silica nanoparticles in water.
Photoluminescence spectra and photographs of 50 nm-sized, dye-doped silica nanoparticles in water.
Stability of 50 nm fluorescent silica nanoparticles in water and ethanol at different pH values; (a) and (b) precipitated SiO2 prepared by FITC-APS conjugation; (c) and (d) dispersed SiO2 prepared by direct modification of fluorescein molecules as described in Scheme 1(b). Images of (b) and (d) were taken under UV illumination.
Stability of 50 nm fluorescent silica nanoparticles in water and ethanol at different pH values; (a) and (b) precipitated SiO2 prepared by FITC-APS conjugation; (c) and (d) dispersed SiO2 prepared by direct modification of fluorescein molecules as described in Scheme 1(b). Images of (b) and (d) were taken under UV illumination.
Fluorescent images of MC3T3-E1 cells incubated with 50 nm-sized, positively charged, orange fluorescent silica nano- particles; 100 mg mlÀ1 of nanoparticles were added to the medium.
Fluorescent images of MC3T3-E1 cells incubated with 50 nm-sized, positively charged, orange fluorescent silica nano- particles; 100 mg mlÀ1 of nanoparticles were added to the medium.
SEM images of silica particles prepared using the Stçber method.
SEM images of silica particles prepared using the Stçber method.

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