Fig. 7: Raman spectroscopy analysis of tin layer and lead-tin layer.
From: Research on tin-covered clay ritual vessels from Shijia Cemetery in Gansu Province, China
a Romarchite (205 cm−1). The amorphous nature of Sn(OH)4 leads to a broad peak appearing at 560–580 cm−1. b PbCO3. c Lead tin yellow type II (PbSnO3), PbO. d Romarchite (SnO).
