Fig. 4From: Characterising the CI and CI-like carbonaceous chondrites using thermogravimetric analysis and infrared spectroscopy3-μm region for CI chondrites Ivuna and Orgueil, and CI-like Y-82162 and Y-980115. Ivuna and Orgueil display a sharp peak at ~2.71 μm due to bound –OH ions in the phyllosilicates. This feature is almost absent from the Y-82162 and Y-980115 spectra as the phyllosilicates were dehydrated by a thermal metamorphic event(s)Back to article page