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Table 3 Summary of the results achieved with the different techniques

From: Integrated analytical approach to unveil the secrets of the recently discovered “Sphinx Room”: a new piece of Domus Aurea puzzle

Color In situ Fragments
Wall (points) pXRF Raman Sample Code (wall) Raman DRIFT ATR
Blue S (1, 2) Cu-rich   B1 (S) Egyptian Blue + Gypsum
  Organic binder?
B2 (S) Egyptian Blue
Greyish N, Vault (3–8) Fe-K rich Weddellite G (Vault)   Kaolinite (Earths?)
   Egyptian Blue?
Vault (9, 10) Cu-rich, Fe-K rich, Pb      
Yellow E, W, Vault (14–16) Fe-rich   Y, YR (Vault / S-W corner) Yellow ochre
  Organic binder?
    Frag1_Y (Vault)   Yellow ochre  
N (11) patina Weddellite     
N (12, 13) Pb-rich     
Orange N (17) Pb-rich      
Red E, W, Vault (20–24) Fe-rich; ± Pb-rich Red ochre (Hematite) R1 (Vault) Red ochre (Hematite)  
    YR (Vault / S-W corner) Red ochre (Hematite)   
    Frag1_R (Vault)   Red ochre (Hematite)  
N (18, 19) patina: no Pb, low Fe   R2 (N) Red ochre (Hematite)
  Pb-based compound
Organic binder
Brown     BR (Vault / S-W corner)   Red ochre (Hematite)  
Magnetite   Magnetite
White N, E, Vault   Calcite Frag1_W (Vault)   Calcite  
    W (W) Calcite + Gypsum Calcite
     Organic binder
Black     BL (S) Carbon