Fig. 4
From: The earliest known artificial synthesized ε-Fe2O3 in the Deqing Kiln ceramic ware of Tang Dynasty
Local Raman mapping results in region I. a Local back-scattering SEM images in region I, where the orange square shows the Raman mapping area. b Optical image corresponds to the orange square area shown (a). c Six principal Raman components obtained in the Raman mapping of area (b). d Raman mapping result of (b) area. In (c) and 4(d), red, green, blue and cyan represent α-Fe2O3, ε-Fe2O3, quartz and anatase respectively