I have landed with amorphous silica, but I need crystalline silica for my work. Is there a simple way in which I can convert the amorphous silica to crystalline one?
Heating amorphous silica causes conversion to the crystalline form under appropriate conditions. Maybe you can find some information in the floowing link:
http://www.iapa.ca/pdf/Silica-in-the-workplace-FEB03.pdf
Annealing during enough time (the higher the tremperature, the shorter the treatment) will convert the (metastable) amourphous silica into a more stable (crystallised) one. Traces of alkali ions (such as those left by touching fused silica by hands) will significantly catalyse the process.
Alain
Thanks Dr Alain, Do we need to ball mill the sample into uniform size before annealing to get uniform crystals?
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