Spectrum

MIR normalized specular reflection spectrum of Calcite monocrystal spar (spot #1)

Title
MIR normalized specular reflection spectrum of Calcite monocrystal spar (spot #1)
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
1516.0 $cm^{-1}$
Instrument
Brucker Vertex 70 + Hyperion 3000 – micro-reflection Mid-IR
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
#1 550.0 - 7500.0 0.482 1.0 0.1
Observation geometry
specular
Observation mode
fixed angles
Incidence angle
0.0°
Emergence angle
0.0°
Azimuth angle
0.0°
Phase angle
0.0°
Illumination
Observation
Comments
some wavelength dependent polarization
Observation mode
single spot
Objective type
x100
Experiment
Calcite: Vis-NIR and Mid-IR diffuse reflectance, MIR specular reflectance and Raman spectra of powders and blocks
Date begin
2021-04-28
Release date
2024-06-09 15:59:28 UTC+0000
Version (Date)
#1 (2024-06-09 15:59:28 UTC+0000, Updated: 2024-07-10 17:41:11 UTC+0000)
History
Date Mode Version Status Comments
2022-08-19 19:39:50 UTC+0000 first import #1 valid version
Analysis
raw specular reflection spectrum calibrated in relative reflectance with "matte gold plate" measured under same geometry assuming flat spectral reflectance over the whole 7500-520 $cm^{-1}$ range, and normalized to 1 at the main reflection maximum at 1516 $cm^{-1}$ . Weak residual water vapor lines (between 2980-3170 and 3500-4000 $cm^{-1}$ ) and $CO_2$ vapor lines (around 670 and 2270-2400 $cm^{-1}$ ) have been corrected by linear interpolation.
Quality flag
4
Validator(s)