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. 2017 Mar 1;13:393–404. doi: 10.3762/bjoc.13.42

Figure 3.

Figure 3

RNA-induced calcium carbonate polymorphism. A: Feigl’s stain of CaCO3 precipitate formed by double decomposition of 1 M CaCl2 + 1 M Na2CO3 in the absence (upper tube) or presence (lower tube) of RNA. B: X-ray powder diffraction of samples prepared the same way showing a net increase in vaterite versus calcite.