In situ X-ray fluorescence-based method to differentiate among red ochre pigments and yellow ochre pigments thermally transformed to red pigments of wall paintings from Pompeii

1. Marcaida, I.
2. Maguregui, M.
3. Fdez-Ortiz de Vallejuelo, S.
4. Morillas, H.
5. Prieto-Taboada, N.
6. Veneranda, M.
7. Castro, K.
8. Madariaga, J.M.