Title
Elemental and spectroscopic characterization of plasters from Fatih Mosque-Istanbul (Turkey) by combined micro-Raman, FTIR and EDXRF techniques
Author
Tanil Akyuz, Sevim Akyuz, Ahmet Gulec
Year
2015
Journal
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Abstract
The characterization of the plasters and coloring agents of the wall paintings of Fatih Mosque have been
performed using combined micro-Raman, FTIR and EDXRF techniques. The investigations show that
the plaster used on the walls has mixed gypsum–lime binders. Cinnabar {HgS}, lead red {Pb3O4} and
hematite {a-Fe2O3} were identified in the red surfaces. Blue color is attributed to ultramarine blue
{Na8–10Al6Si6O24S2–4}. Green color is assigned to mixtures of green earth, copper phthalocyanine
{Cu(C32Cl16N8)} and brochantite {CuSO4 3Cu(OH)2}. Strontium yellow {SrCrO4} and zinc white {ZnO}
were also used to ensure the color tone. The results provide a basis for future restoration of wall paints.
Instrument
NRS-3100
Keywords
Raman Imaging Spectroscopy, EDXRF, Fatih Mosque, Plasters, Wall paints