Spectrum Vis-NIR reflectance spectrum of Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=0h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=1h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=3h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=6h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=9h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=14h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=19h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=29h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=39h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 173 K (t=50h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 175 K (t=68h) Spectrum Vis-NIR reflectance spectrum of several millimeters thick sublimation residue made of Nontronite at 213 K (t=88h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 215 K (t=89h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 217 K (t=90h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 219 K (t=91h) Spectrum Vis-NIR reflectance spectrum of sublimating Water ice particles 67±31μm containing 1wt% Nontronite in intra-mixture at 221 K (t=92h) Spectrum Vis-NIR reflectance spectrum of a 1-mm thick sublimation residue made of Nontronite at 223 K (t=93h) Spectrum Vis-NIR reflectance spectrum of a 1-mm thick sublimation residue made of Nontronite at 225 K (t=94h) Spectrum Vis-NIR reflectance spectrum of a 1-mm thick sublimation residue made of Nontronite at 231 K (t=97h) Spectrum Vis-NIR reflectance spectrum of a 1-mm thick sublimation residue made of Nontronite at 241 K (t=103h) Spectrum Vis-NIR reflectance spectrum of a 1-mm thick sublimation residue made of Nontronite at 261 K (t=113h) Spectrum Vis-NIR reflectance spectrum of a 1-mm thick sublimation residue made of Nontronite at 297 K (t=132h)