Fig. 13From: Integrated analytical approach to unveil the secrets of the recently discovered “Sphinx Room”: a new piece of Domus Aurea puzzleFTIR-ATR absorbance spectra (ranges 400–1750 and 2600–4000 cm−1) of samples: (a/a’) BL, (b/b’) W, (c/c’) BR, (d/d’) (e/e’) R2, (f/f’) Y, (g/g’) G, (h/h’) B2, (i/i’) B1. For the high-wavenumber range, the absorbance values were magnified X3. Red dotted lines and positions: calciteBack to article page