which was performed
in aqueous media on a Malvern Mastersizer ‘‘E’’, indicated
a volume mean diameter (VMD or D[v, 0.5]) of 17 ± 1 lm, with D[v,
0.9], D[v, 0.1] and D[3, 2] of 56 ± 1, 2 ± 1 and 6 ± 1 lm, respectively.
Fig. 2 illustrates the cumulative particle size distribution of wollastonite
particles before and after acid dissolution.