Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 279 K (first) Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 93 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 103 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 113 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 128 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 143 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 163 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 183 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 208 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 233 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 258 K Spectrum VNIR reflectance of Natrite 36-50 µm grain size at T = 279 K (last)