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Local autocatalytic co-precipitation phenomena in self-assembled silica-carbonate materials

Kellermeier, Matthias ; Melero-García, Emilio ; Kunz, Werner ; García-Ruiz, Juan Manuel


Under certain conditions, pptn. of Ba carbonate in alk. SiO2-rich environments affords unusual polycryst. aggregates exhibiting curved shapes and hierarchical structuring, very much reminiscent of biogenic mineral tissues. The formation of these so-called SiO2 biomorphs is thought to rely on a coupling of chem. equil. in soln., which drives concerted co-mineralization and self-assembly of ...


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