C–O stretching band of CH₃OH (black) fitted with the sum of three Gaussians (red), which account for: mixed methanol (green dotted, centered at 1016 cm^-1), segregated methanol (purple dotted, centered at 1025 cm^-1), and methanol forming a type II clathrate hydrate with water molecules (blue dotted, centered at 1034 cm^-1). A fourth Gaussian has been used to take into account the contribution of the blue wing of the H₂O librational band (black dotted). The IR spectra correspond to a pre-cometary ice analog (E11) at a) T = 110 K; b)T = 150 K; and c) T = 160 K. The χ² parameter is indicated for each fit.