Figure 4 | Scientific Reports

Figure 4

From: The role of chitin-rich skeletal organic matrix on the crystallization of calcium carbonate in the crustose coralline alga Leptophytum foecundum

Figure 4

Raman spectroscopic imaging. (A) Raman Image and Multivariate Curve Resolution (MCR) analysis of powder sample. Light (A1) and Multivariate Curve Resolution (MCR) Raman (A2, A3) images of sample. The 2 components of MCR analysis corresponding to red and blue areas in image and showing, respectively, Raman peaks of Calcite (1086, 711, 284 and 158 cm−1) and Aragonite (1082, 700, 279, 205 and 150 cm-1). Blue areas corresponding to aragonite occupy about 29% of the total area of sample. (B) Detection of minerals in the skeleton. Representative averaged Raman spectra from red (aragonites) and green (calcites) areas of the image, respectively, showing a peak at 206 cm-1 and shift of most intense peaks from 1087 to 1083 cm-1. This provides evidence for the presence of aragonite in red areas. Spectra are shown on a common scale.

Back to article page