Vis-NIR reflectance spectra of a mixture of Magnetite, NH4-Nontronite, Antigonite and Dolomite, pure, mixed with Water ice, during and after ice sublimation

This mixture was prepared as a spectral analogue for Ceres surface material. We measured the reflectance spectra (from 0.5 to 4 µm) of the mixture pure (at room temperature) and mixed with water ice particles (at 173 K), as well as during and after sublimation of the water ice under high vacuum (at 173 K). The spectrum of the surface obtained after sublimation exhibits a blue spectral slope.