MIR bidirectional reflectance spectrum of Magnetite powder inf. 45µm
- Title
- MIR bidirectional reflectance spectrum of Magnetite powder inf. 45µm
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20250903_001
- Data reference
- Schmitt, Bernard (2021): Magnetite: Vis-NIR-MIR diffuse reflectance and Raman spectra. SSHADE/DRIMS (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20250903_001
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- Intensity unit
- no unit
- Instrument
- Brucker Vertex 70 #2 – reflection Mid-IR
- Sample holder
- cylindrical raw aluminium sample holders of various sizes for powders
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- MIR
- Valid spectral range(s)
-
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge #1 525.0 - 5000.0 0.482 0.96 0.2 - Scan number
- 400
- Comments
- measured over 500-7000 cm-1 range
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
- biconical
- Observation mode
- fixed angles
- Incidence angle
- 0.0°
- Emergence angle
- 30.0°
- Azimuth angle
- 0.0°
- Phase angle
- 30.0°
Illumination
Observation
- Comments
- some wavelength dependent polarization
- Observation mode
- single spot
- Resolutions
- 4.0 ${\pm}$ 0.2 $mm$
- Experiment
- Magnetite: Vis-NIR-MIR diffuse reflectance and Raman spectra
- Date begin
- 2022-06-23
- Release date
- 2025-10-19 19:02:27+0000 UTC
- Version (Date)
- #1 (2025-10-19 19:02:27+0000 UTC, Updated: 2025-10-19 19:02:27+0000 UTC)
- History
-
Date Mode Version Status Comments 2025-10-19 15:28:18+0000 UTC first import #1 valid version
- Analysis
- bidirectional reflectance spectrum calibrated with a window with a depolished gold deposit using its relative spectral reflectance, scaled (x 1.037) with the VNIR measurement at 2.0 µm. The remaining week lines of atmospheric $H_2O$ (3586-3750 $cm^{-1}$) and $CO_2$ (665-671.5, 2280-2390 $cm^{-1}$) gas absorption have been removed by linear interpolatation in these ranges. A small binomial smooting (9) has been applied to reduce high frequency noise.
- Quality flag
- 4
- Validator(s)