Spectrum

NIR-MIR reflectance spectra (i = 0°, e = 30°) of powdered biotite (50 - 100 μm)

Title
NIR-MIR reflectance spectra (i = 0°, e = 30°) of powdered biotite (50 - 100 μm)
DOI
10.26302/SSHADE/EXPERIMENT_OP_20240717_001
Data reference
Wargnier, Antonin; Poch, Olivier; Beck, Pierre (2022): NIR-MIR reflectance spectra (i=0°, e=30°, az=0°) of phyllosilicates and Phobos simulants (mixed silicates and coals). SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_OP_20240717_001
Publications
Experiment type
laboratory measurement
Type
reflectance factor
Instrument
Brucker Vertex 70 – transmission Mid-IR
Sample holder
Aluminum sample holder in a biconical reflectance kit A513/QA
Standard medium
air
Observation mode
spectrum
Spectral range type(s)
NIR, MIR
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 1.5 - 18.0
Observation geometry
biconical
Observation mode
fixed angles
Incidence angle
0.0°
Emergence angle
30.0°
Azimuth angle
0.0°
Phase angle
30.0°
Resolution observation
5.0°
Illumination
Observation
Comments
some wavelength dependent polarization
Observation mode
single spot
Resolutions
5.0 ${\pm}$ 1.0 $mm$
Experiment
NIR-MIR reflectance spectra (i=0°, e=30°, az=0°) of phyllosilicates and Phobos simulants (mixed silicates and coals)
Date begin
2023-05-22
Release date
2024-07-17 14:48:51 UTC+0000
Version (Date)
#1 (2024-07-17 14:48:51 UTC+0000, Updated: 2024-07-17 14:48:51 UTC+0000)
History
Date Mode Version Status Comments
2024-07-17 14:05:06 UTC+0000 first import #1 valid version
Analysis
The spectrum was measured with a reflectance kit on a FTIR spectrometer, with 100 scans and a spectral resolution of 4 cm−1. The spectral reference was a measurement of the direct flux with i = 90° and e = 90°. After this spectral calibration, a photometric calibration was performed by scaling the reflectance to that of the same sample measured with the SHADOWS spectro-gonio-radiometer (EXPERIMENT_LB_20240713_001). To take into account the spectral variability induced by the sample surface preparation, we measured the reflectance spectrum for each sample three times, re-preparing each time the sample. The spectrum shown here is the average of these three spectra. Residual water vapor lines (between 1750-1400, 3900-3550, 5500-5200 cm-1) and CO2 vapor lines (around 630-700 and 2360-2300 cm-1) can be observed.
Quality flag
3