Experiment
Near-infrared reflectance spectra at low temperature (300-62K) of Tschermigite and FE-Ammonium aluminium sulfate dodecahydrate [(NH4)Al(SO4)2·12(H2O)] powders with three grain size ranges (32-80, 80-125 and 125-150µm)
Sub-Experiment
32-80 µm grain sizes
Sub-Experiment
Temperature cycle of Tschermigite (270K - 90K - 270K)
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 270K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 90K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 100K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 110K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 120K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 130K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 140K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 150K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 160K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 180K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 200K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 220K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 245K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 270K (up) with 32-80 µm grain sizes
Sub-Experiment
Cooling down around PE-FE Ammonium aluminium sulfate dodecahydrate phase transition at 76K
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 260K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 80K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 79K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 78K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 77K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 76K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 75K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 74K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 73K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 70K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 65K (down) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 62K (down) with 32-80 µm grain sizes
Sub-Experiment
Warming up around FE-PE Ammonium aluminium sulfate dodecahydrate phase transition at 76K
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 65K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 70K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 73K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 74K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of FE-Ammonium aluminium sulfate dodecahydrate powder at 75K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 76K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 77K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 78K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 79K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 80K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 90K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 100K (up) with 32-80 µm grain sizes
Spectrum
Near-infrared reflectance spectra of Tschermigite (PE alpha-Ammonium aluminium sulfate dodecahydrate) powder at 150K (up) with 32-80 µm grain sizes
Layer
- Name
- Layer #1
- Type of layer
- granular
- Thickness
- 3.5 $\pm$ 0.1 $mm$
- Mass
- 0.232 $\pm$ 0.002 $g$
- Texture
- pulverulent
- Type of porosity
- open pores
- Porosity
- 0.741 $\pm$ 0.008
- Density
- 0.428 $\pm$ 0.015 $g.cm^{-3}$
- Formation mode
- manual deposition
- Temperature
- 300.0 $K$
- Comments
- slightly smoothing the surface by sliding a flat aluminium plate