MIR normalized biconical reflectance spectrum of Calcite hydrothermal concretion (Massif Central, F)
- Title
- MIR normalized biconical reflectance spectrum of Calcite hydrothermal concretion (Massif Central, F)
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20220803_001
- Data reference
- Schmitt, Bernard; Leclef, Apolline; Montagnac, Gilles (2021): Calcite: Vis-NIR and Mid-IR diffuse reflectance, MIR specular reflectance and Raman spectra of powders and blocks. SSHADE/DRIMS (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20220803_001
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- normalized reflectance
- Intensity unit
- no unit
- Reference position
- 7500.0 cm−1
- 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)
- NIR, MIR
- Valid spectral range(s)
-
Min - Max (cm−1) Sampling (cm−1) Resolution (cm−1) Position accuracy (cm−1) Absorption edge #1 540.0 - 7500.0 0.482 1.0 0.1
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 ± 0.5 mm
- Name
- Calcite hydrothermal concretion
- Comments
- Contain a small amount of Fe
- Experiment
- Calcite: Vis-NIR and Mid-IR diffuse reflectance, MIR specular reflectance and Raman spectra of powders and blocks
- Date begin
- 2022-05-05
- Release date
- 2024-06-09 15:59:28+0000 UTC
- Version (Date)
- #1 (2024-06-09 15:59:28+0000 UTC, Updated: 2024-07-10 17:41:11+0000 UTC)
- History
-
Date Mode Version Status Comments 2022-08-19 19:39:50+0000 UTC first import #1 valid version
- Analysis
- raw biconical reflectance spectrum calibrated in relative reflectance with "matte gold plate" measured under same geometry assuming flat spectral reflectance over the whole 7500-540 cm−1 range, and normalized to 1 at 7500 cm−1 . 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 ) have been partly corrected by dividing by scaled H2O and CO2 vapor transmission spectra measured at same resolution and sampling.
- Quality flag
- 4
- Validator(s)