Experiment
NIR spectra of a series of opal (-A and -CT) in ambient conditions and at low temperature (~ -35°C) and/or low pressure (~ 8 mbar)
Sub-Experiment
opal-A 86.2: Tamb, low T, low P
Sub-Experiment
opal-A 785: Tamb, low T, low P
Sub-Experiment
opal-A 1040: Tamb, low T, low P
Sub-Experiment
opal-CT 521: Tamb, low T
Sub-Experiment
opal-CT 1085: Tamb, low T, low P
Sub-Experiment
opal-A 1543a: Tamb, low T
Sub-Experiment
opal-CT 1543b: Tamb, low T, low P
Sub-Experiment
opal-CT 1543d: Tamb, low T, low P
Sub-Experiment
opal-CT 1548: Tamb, low T
Sub-Experiment
opal-CT 1551: Tamb, low T, low P
Sub-Experiment
opal-CT 1552a: Tamb, low T, low P
Sub-Experiment
opal-CT 1552b: Tamb, low T
Sub-Experiment
opal-A 1039: Tamb, low T
Sub-Experiment
opal-CT VTB: Tamb, low P
Sub-Experiment
opal-CT WT86: Tamb, low P
Sub-Experiment
opal-CT YM12: Tamb, low P
- Database
- Experimentalists
- Date
- 2017-01-01
- Body name
- Earth
- Terrain type
- mineral surface
- Place
- San Martin , Jalisco , Mexico
Coordinates
- System
- WGS84
- Thickness
- 355.0 ± 5.0 μm
- Sample changes
- Exposed to low temperature, water molecules in opal crystallize, inducing significant variation in shape and position of the bands at 5200 cm-1 and 7000 cm-1
- Comments
- origin: hydrothermal
- Temperature
- -51.8 ± 3.0 ∘C
- Comments
- temperature deduced from the ice-related NIR bands observed in the sample (temperature measured in the cell = -94°C)
- Type
- ambient air
- Fluid temperature
- 20.0 ± 3.0 ∘C
- Fluid pressure
- 1.0 ± 0.05 bar
- Number
- 1
- Layers
-
- Layer #1 , 355.0 μm