Sn-L_3 EDGE and Fe K edge XANES spectra of the surface layer of ancient Chinese black mirror Heiqigu

The Chinese ancient black mirror known as Heiqigu was studied by x-ray-absorption near-edge structure spectroscopy and results were reported.The Sn-L3 edge and Fe K edge spectra further confirmed the Schottky-type defect model in the Heiqigu surface system.And it was suggested that the surface layer of the mirror was a combined structure of oxidation of Sn(IV) and Sn(II).