The effect of high temperatures on the mid-to-far-infrared emission and near-infrared reflectance spectra of phyllosilicates and natural zeolites: Implications for martian exploration

► We report TIR and NIR spectra of calcined clays and natural zeolites. ► IR spectral changes with heating are affected by samples' thermal reactions. ► IR spectral changes with heating are affected by the type of octahedral cations. ► Some heated clays may lose their TIR spectral features while keeping their NIR bands.