Figure 2

FWHM variation of the: (a) main carbonate Raman band (1083 cm⁻¹), (b) lattice mode at 152 (cm⁻¹), (d) the ratio of the 1083 and 152 cm⁻¹ bands, along the growth line. (c) Comparison of the FWHM ratio (152/1083 cm⁻¹), with different collecting objectives (5 ×, 20 × and 100 ×).