Fig. 11

DRIFTS (a-d) and Raman spectra (e–h) of Rudern (a, b; e, f) and Apokalyptischer Reiter II (c, d; g, h) along with detailed photos of the measured areas; offset was applied for better comparison. DRIFT spectra originate from the following spots: a) the red area of Fig. 3c (spot 5), b) the green area of Fig. 3c (spot 4), c) the bluish green area of Fig. 6c (spot 3) and d) the green area of Fig. 6c (spot 5); RSB = reststrahlen band. Raman spectra originate from the following spots: e) the greenish blue area of Fig. 3c (spot 1), f) the blue area of Fig. 3c (spot 3), g) the pinkish red area of Fig. 6c (spot 2) and h) the blue area of Fig. 6c (spot 1). Reference spectra (grey lines): cf. [40]; × = measured spots