11/27/2023 0 Comments Types of art in egypt china legacy![]() Tin compounds as admixtures to the lead minerals-the latter required as flux additive for the preparation of the Chinese blues-or tin admixtures to pristine barium starting minerals could be excluded, as well as the use of tin containing mineral mushistonite (CuSn(OH) 6), primarily intended to be applied as copper source. Involvement of the rare mineral pabstite Ba(Sn,Ti,Zr)Si 3O 9 from the Tian Shan mountains could be ruled out due to absence of Ti and Zr in the elemental composition. While the artificial nature of the ancient barium copper silicates was undoubted, the synthetic or mineral origin of BaSnSi 3O 9 of these murals had to be clarified. The pigments of the LY01 and LY02 samples were analyzed by archaeometrical methods: powder X-ray diffractometry (XRD), scanning electron microscopy (SEM–EDX) and micro-Raman spectroscopy. Man-made ancient Chinese barium copper silicate pigments: Chinese (Han) Purple, BaCuSi 2O 6 Chinese (Han) Blue, BaCuSi 4O 10 Chinese Dark Blue, BaCu 2Si 2O 7 (in summary called Chinese blues), and platelet-like crystals of BaSnSi 3O 9 were detected on mural paintings of a tomb in Luoyang City, Henan Province, China, dated to Western Han Dynasty (206 BC–8 AD).
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