- Title
- Near-infrared reflectance spectra at low temperature (110-290K) of delta, gamma and beta Diammonium hydrogen phosphate [(NH4)2HPO4] powders with three grain size ranges (32-80, 80-125 and 125-150µm)
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20241809_001
- Data reference
- Fastelli, Maximiliano; Schmitt, Bernard; Beck, Pierre; Poch, Olivier (2021): Near-infrared reflectance spectra at low temperature (110-290K) of delta, gamma and beta Diammonium hydrogen phosphate [(NH4)2HPO4] powders with three grain size ranges (32-80, 80-125 and 125-150µm). SSHADE/CSS (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20241809_001
- Publications
- Comments
- Europlanet-2024 TNA data
- Database(s)
- Experimentalists
- Type(s)
- laboratory measurement
- Description
- Near-infrared reflectance spectra at low temperature (110-290K) of delta (110-173K), gamma (174-245K) and beta (246-290K) Diammonium hydrogen phosphate powder [(NH4)2HPO4] with 32-80 µm, 80-125µm and 125-150µm grain size ranges
- Number of spectra
- 55
- Variable type(s)
-
- sample grain size
- sample phase
- temperature
- Comments
- changes from phase delta to gamma occur at 174K, and from gamma to beta at 246K
- Instrument
- SHINE Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- Cylindrical aluminum sample holder placed in the isothermal CarboN-IR cryogenic cell with two saphire windows.
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- NIR
- Valid spectral range(s)
-
Min - Max ($nm$) Sampling ($nm$) Resolution ($nm$) Position accuracy ($nm$) Absorption edge #1 1000.0 - 1600.0 10.0 7.55 1.0 #2 1610.0 - 2830.0 10.0 15.3 1.5 #3 2840.0 - 3200.0 10.0 31.0 3.0 #4 3220.0 - 4180.0 20.0 30.9 3.0 #5 4340.0 - 4600.0 20.0 30.75 3.0 - Comments
- A series of high pass filters is used to remove high orders of the gratings
Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).
- Observation geometry
- bidirectional
- Observation mode
- fixed angles
- Incidence angle
- 0.0°
- Emergence angle
- 20.0°
- Azimuth angle
- 0.0°
- Phase angle
- 20.0°
- Resolution illumination
- 5.8°
- Resolution observation
- 4.1°
- Comments
- 'Gognito' illumination attachment with focused beam.
Illumination
Observation
- Comments
- Partial polarization variable with wavelength (from the 3 monochromator gratings used)
- Observation mode
- single spot
- Spatial resolution
- 7.5 $mm$
- Date begin - end
- 2021-10-22 - 2021-11-04
Versions
- Release date
- 2024-09-28 05:17:32 UTC+0000
- Version (Date)
- #1 (2024-09-28 05:17:32 UTC+0000, Updated: 2024-09-28 05:17:32 UTC+0000)
- Sponsors
-
- European Commission - Horizon 2020-RI (EC-H2020) (EPN2024-RI: Europlanet 2024 Research Infrastructure, grant No 871149 (TA2/DPSF/CSS/20-EPN1-081))