Figure 4
Representative LIF spectra of geogenic and biogenic samples of calcite and aragonite. For each sample, 16 spectra were acquired by scanning point by point and covering a surface of ~1.5 cm2. Characteristic and/or medium spectra for each sample are here presented. Some samples present heterogenous composition of the analyzed surface and more than one spectrum of the same sample is shown: Aragonite 1 (a); Aragonite 3 (b); external and internal surface of Shell A1 (c); Calcite 2 compared with Aragonite 3 (d); Calcite 3 (e); Calcite 4 (f).
