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. 2011 Nov 23;6(11):e28195. doi: 10.1371/journal.pone.0028195

Figure 5. FTIR spectra of cuttlebones of Sepia sp. and M. mississippiensis.

Figure 5

Spectra of Sepia sp. (top) and M. mississippiensis (bottom). Spectra indicate aragonite. By comparison, calcite has peaks at 848 and 876 cm−1and a singlet at 713 cm−1 [14].