Original paper
Natural carbon black (Oltu-stone) from Turkey: a micro-Raman study
Hatipoğlu, Murat; Ajò, David; Kibici, Yaşar; Passeri, Daniele
Neues Jahrbuch für Mineralogie - Abhandlungen Band 189 Heft 1 (2012), p. 97 - 101
published: 2/1/2012
DOI: 10.1127/0077-7757/2012/0211
published: 2/1/2012
DOI: 10.1127/0077-7757/2012/0211
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RIS bibliography file
ArtNo.: ESP154018901006
Abstract
This study focuses on the characterization of a carbon black material from the Oltu-Erzurum region (traditionally called in Turkey “Oltu-stone“ or “black-amber“), which is of interest in several fields, among these archaeometry and jewellery.
Raman spectra were recorded between 50 and 3200 cm-1: measurements in a wide spectral range are the basis for effective characterization and identification with respect to analogous materials. Correlations between the spectrum and the structure are discussed: two higher energetic Raman peaks at 1346 and 1585 cm-1 are characteristic of the crystalline carbon regions, whereas the weaker ones at 2654 and 2904 cm-1 are ascribed to amorphous carbon regions on the Oltu-stone surface. In addition, the enhanced background between 250 and 400 cm-1 could be associated with the presence of pyrite.Keywords
natural carbon black • oltu-stone • dispersive (visible) confocal micro-raman spectroscopy (dcμrs) • oltu-erzurum • turkey