Fig. 4
From: Microstructure and long-term corrosion of archaeological iron alloy artefacts
Raman spectra results for object #1: a zone A, b zone B, c zone C and d zone D. The zones are indicated in Fig. 2. G: goethite, H: hematite, Mt: magnetite, L: lepidocrocite, Mh: maghemite, S: siderite
