Cathodoluminescence of synthetic and natural calcite: the effects of manganese and iron on orange emission |
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Authors: | S Cazenave R Chapoulie G Villeneuve |
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Institution: | (1) CRP2A (Centre of Physics for Archaeology), CNRS – UMR 5060 IRAMAT, Bordeaux 3 University, France, FR |
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Abstract: | Summary The orange cathodoluminescence (CL) of calcite is known to be due to the presence of Mn2+ cations. It has been demonstrated here using CL and electron paramagnetic resonance (EPR) crossed analysis from synthetic calcite that neither Fe2+ nor Fe3+ ions influence this luminescence emission. More complex natural calcium carbonates have been investigated to check whether or not this conclusion can be applied to them. For this purpose, different white marbles from Greek quarries were analysed with CL. The data are completed with neutron activation analysis (NAA) for manganese and iron contents. Again it is shown that only manganese plays a role in the orange CL of these white marbles. This result provides an important clue in the wide field of provenance determination of calcium carbonate used in ancient art.Received February 19, 2002; revised version accepted October 22, 2002
Published online March 10, 2003 |
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