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ON THE ORIGIN OF GREY AND BLACK ‘COLOURS’ OF ANCIENT POTTERY: ROLE OF Fe AND Ti4+ IONS |
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| Authors: | P. G. MANNING |
| Abstract: | It is shown, from comparisons with the optical absorption of minerals, that the black and grey colours of pottery can arise from Fe2+ Fe3+ and Fe2+ Ti4+ charge-transfer (or electron-hopping) processes, the cations being located at the centres of adjacent edge-sharing octahedra. |
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