Photoluminescence of the inorganic pigments Egyptian blue, Han blue and Han purple
| Autor: | Marialuisa Favaro, David Ajò, Giacomo Chiari, Giorgio Pozza, Franco De Zuane |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Archeology
Photoluminescence Chemistry Materials Science (miscellaneous) Pl spectra Mineralogy Conservation Egyptian blue chemistry.chemical_compound Pigment Chemistry (miscellaneous) visual_art Inorganic pigments visual_art.visual_art_medium Luminescence General Economics Econometrics and Finance Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Cultural Heritage. 1:393-398 |
| ISSN: | 1296-2074 |
| DOI: | 10.1016/s1296-2074(00)01095-5 |
| Popis: | The room-temperature photoluminescence spectra of various samples of Egyptian blue (CaCuSi4O10) are presented, discussed and compared with those of recently synthesized compounds corresponding to the ancient pigments Han blue (BaCuSi4O10) and Han purple (BaCuSi2O6). All the samples of Egyptian blue show identical spectra, in spite of their very different origin. The spectra of Han blue and Han purple are significantly different. Since the Cu2+ ion may be considered the only luminescent centre in the spectral range under investigation, the differences between the spectra of the various pigments are ascribed to a ligand-field change. This can be related to the larger size of the Ba2+ ion with respect to Ca2+. The use of PL spectra for the identification of these pigments in works of art is proposed. |
| Databáze: | OpenAIRE |
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