Fig 5From: Scientific investigation to look into the conservation history of a Tang Dynasty terracotta Dancing HorseSelected and representative Raman spectra where a hematite (223, 291, 401 cm−1) and anatase (149 cm−1), b anatase (149, 392, 511, 632 cm−1), c anhydrite (1017 cm−1), d anhydrite (1017 cm−1) and gypsum (1009 cm−1) were detected. c, d spectra are acquired in two different areas of the sample 8 powderBack to article page