Spectrum

Vis-NIR bidirectional reflectance spectrum of Calcite powder, unsieved

Title
Vis-NIR bidirectional reflectance spectrum of Calcite powder, unsieved
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
Experiment type
laboratory measurement
Type
reflectance factor
Intensity unit
no unit
Instrument
SHINE Spectro-Gonio bidirectional reflection Vis-NIR
Sample holder
cylindrical raw aluminium sample holders of various sizes for powders
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
Vis, NIR
Valid spectral range(s)
Min - Max () Sampling () Resolution () Position accuracy () Absorption edge
#1 394.0 - 678.0 4.0 1.92 0.5
#2 682.0 - 1598.0 4.0 3.8 0.5
#3 1602.0 - 2834.0 4.0 7.65 0.8
#4 2842.0 - 4186.0 8.0 15.45 1.6
#5 4346.0 - 4642.0 8.0 15.45 1.6
Filters
Type Center/Edge () Width () Place
#1 several high frequency filters output of monochromator
Scan number
50
Comments
slit 600µm, resolution vary by up to over each spectral range
Observation geometry
bidirectional
Observation mode
fixed angles
Incidence angle
0.0°
Emergence angle
30.0°
Azimuth angle
0.0°
Phase angle
30.0°
Resolution illumination
5.8°
Resolution observation
4.1°
Illumination
Observation
Comments
some wavelength dependent polarization
Observation mode
single spot
Resolutions
7.5 0.2
Comments
illumination with 9 fiber optic spots within 7.5 mm diameter, observation within an ellipse of 23x20 mm
Name
Calcite powder (unsieved)
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
2021-04-11
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 bidirectional reflectance spectrum calibrated: 1) with "Spectralon 99%" measured under same geometry using its absolute BRDF (0.36-1.3 µm) and 2) with "Infragold" using its relative spectral reflectance (1.3-4.65 µm) scaled with Spectralon at 1.3 µm. The badly corrected range of atmospheric gas absorption (4.19-4.34 µm) has been removed.
Quality flag
4
Validator(s)