The crystallization of SrCO_3 particles from aqueous solutions in the absence and presence of a polyanionic additive has been investigated. Olive-like SrCO_3 particles and bundle-like aggregates consisting of SrCO_3 needles aligned radially toward both ends are synthesized in aqueous solutions by simply varying the SrCO_3 concentration. Both ends of the bundle-like aggregates of SrCO_3 needles tend to become rounded and extended in the presence of poly- (methacrylic acid) (PMAA); accordingly, uniform peanut-like, spherical and dendritic SrCO_3 particles can be prepared in suitable conditions, respectively.

Key words: BIONICS, SYNTHESIS, SURFACE TOPOGRAPHY, STRONTIUM CARBONATE, PARTICLE