Assertion: calcium carbonate's form | /r/HasAspect | a width of 15 nm
Facets:
Source sentences:
text: At the time when the carbonation rate reached 50%, 75 g (calculated as the weight of SiO 2 and corresponding to 5 g per 100 g of calcium carbonate formed) of a 20 wt % colloidal silica (in an elongated form having a width of 15 nm and a major axis of 100 nm) solution was added, and the mixed gas was further fed so as to continue the carbonation reaction, followed by completing the carbonation reaction at the time when the pH of the slurry arrived at 7.