Laboratory infrared reflection spectrum of carbon dioxide clathrate hydrates for astrophysical remote sensing applications

► We acquired first infrared reflectance spectra of CO2 sI clathrate hydrate. ► Experimental conditions are representative of the icy moons' surfaces. ► CO2 clathrate hydrates show absorption bands at 2.71, 4.26, and 4.28 μm. ► IR spectra depend on the sample optical and physical characteristics. ► CO2 absorption bands on icy moons do not correspond to CO2 sI clathrate hydrate.