archaeometrical study of achaemenid glazed bricks found from tall-e-ajori excavation in persepolis

achaemenid glazed bricks of archaeological excavation of tall-e-ajori in persepolis city were studied by multiple instrumental analysis methods  such as xrf, xrd, sem-eds, icp and optical microscopy to identify the compositional features of glaze and brick body. glaze samples are apparently white and yellow  and this phenomenon are caused by the deterioration processes in burial environment, hence optical microscopic studies on the glaze layer determined blue areas on the white substrate and, high sensitivity quantitative analysis detected copper and cobalt as the producer of blue color ions, and sb and pb as the producer of yellow color ions. due to instability of glaze chromofore elements such as cu and sb in temperatures higher than 1000⁰c, the reported elements show that, glazed bricks should be fired less in than 1000⁰c. the quantitative elemental analysis results are compared with the elemental analysis of susa glazed samples of apadana palace.