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. 2012 Apr 6;6(2):022001–022001-10. doi: 10.1063/1.3683162

Figure 2.

Figure 2

SEM micrograph of CaCO3 particles precipitated in bulk solution by combination of 4 mM CaCl2 and Na2CO3 solutions. A mixture of calcite and vaterite polymorphs is reproducibly obtained in a (approximately) 1:1 ratio with an average crystal size of 9 μm.