CT-YM12 | GhoSST | SSHADE

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 NIR spectra of opal-A 86.2 in ambient conditions

Spectrum NIR spectrum of opal-A 86.2 under ambient conditions Spectrum NIR spectrum of opal-A 86.2 under ambient conditions

Sub-Experiment NIR spectra of opal-A 86.2 at low temperature

Spectrum NIR spectrum of opal-A 86.2 at low temperature Spectrum NIR spectrum of opal-A 86.2 at low temperature

Sub-Experiment NIR spectra of opal-A 86.2 at low pressure

Spectrum NIR spectrum of opal-A 86.2 at low pressure Spectrum NIR spectrum of opal-A 86.2 at low pressure

Sub-Experiment opal-A 785: Tamb, low T, low P

Sub-Experiment NIR spectra of opal-A 785 in ambient conditions

Spectrum NIR spectrum of opal-A 785 under ambient conditions Spectrum NIR spectrum of opal-A 785 under ambient conditions

Sub-Experiment NIR spectra of opal-A 785 at low temperature

Spectrum NIR spectrum of opal-A 785 at low temperature Spectrum NIR spectrum of opal-A 785 at low temperature

Sub-Experiment NIR spectra of opal-A 785 at low pressure

Spectrum NIR spectrum of opal-A 785 at low pressure Spectrum NIR spectrum of opal-A 785 at low pressure

Sub-Experiment opal-A 1040: Tamb, low T, low P

Sub-Experiment NIR spectra of opal-A 1040 in ambient conditions

Spectrum NIR spectrum of opal-A 1040 under ambient conditions Spectrum NIR spectrum of opal-A 1040 under ambient conditions

Sub-Experiment NIR spectra of opal-A 1040 at low temperature

Spectrum NIR spectrum of opal-A 1040 at low temperature Spectrum NIR spectrum of opal-A 1040 at low temperature

Sub-Experiment NIR spectra of opal-A 1040 at low pressure

Spectrum NIR spectrum of opal-A 1040 at low pressure Spectrum NIR spectrum of opal-A 1040 at low pressure

Sub-Experiment opal-CT 521: Tamb, low T

Sub-Experiment NIR spectra of opal-CT 521 in ambient conditions

Spectrum NIR spectrum of opal-CT 521 under ambient conditions Spectrum NIR spectrum of opal-CT 521 under ambient conditions

Sub-Experiment NIR spectra of opal-CT 521 at low temperature

Spectrum NIR spectrum of opal-CT 521 at low temperature Spectrum NIR spectrum of opal-CT 521 at low temperature

Sub-Experiment opal-CT 1085: Tamb, low T, low P

Sub-Experiment NIR spectra of opal-CT 1085 in ambient conditions

Spectrum NIR spectrum of opal-CT 1085 under ambient conditions Spectrum NIR spectrum of opal-CT 1085 under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1085 at low temperature

Spectrum NIR spectrum of opal-CT 1085 at low temperature Spectrum NIR spectrum of opal-CT 1085 at low temperature

Sub-Experiment NIR spectra of opal-CT 1085 at low pressure

Spectrum NIR spectrum of opal-CT 1085 at low pressure Spectrum NIR spectrum of opal-CT 1085 at low pressure

Sub-Experiment opal-A 1543a: Tamb, low T

Sub-Experiment NIR spectra of opal-CT 1543a in ambient conditions

Spectrum NIR spectrum of opal-CT 1543a under ambient conditions Spectrum NIR spectrum of opal-CT 1543a under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1543a at low temperature

Spectrum NIR spectrum of opal-CT 1543a at low temperature Spectrum NIR spectrum of opal-CT 1543a at low temperature

Sub-Experiment opal-CT 1543b: Tamb, low T, low P

Sub-Experiment NIR spectra of opal-CT 1543b in ambient conditions

Spectrum NIR spectrum of opal-CT 1543b under ambient conditions Spectrum NIR spectrum of opal-CT 1543b under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1543b at low temperature

Spectrum NIR spectrum of opal-CT 1543b at low temperature Spectrum NIR spectrum of opal-CT 1543b at low temperature

Sub-Experiment NIR spectra of opal-CT 1543b at low pressure

Spectrum NIR spectrum of opal-CT 1543b at low pressure Spectrum NIR spectrum of opal-CT 1543b at low pressure

Sub-Experiment opal-CT 1543d: Tamb, low T, low P

Sub-Experiment NIR spectra of opal-CT 1543d in ambient conditions

Spectrum NIR spectrum of opal-CT 1543d under ambient conditions Spectrum NIR spectrum of opal-CT 1543d under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1543d at low temperature

Spectrum NIR spectrum of opal-CT 1543d at low temperature Spectrum NIR spectrum of opal-CT 1543d at low temperature

Sub-Experiment NIR spectra of opal-CT 1543d at low pressure

Spectrum NIR spectrum of opal-CT 1543d at low pressure Spectrum NIR spectrum of opal-CT 1543d at low pressure

Sub-Experiment opal-CT 1548: Tamb, low T

Sub-Experiment NIR spectra of opal-CT 1548 in ambient conditions

Spectrum NIR spectrum of opal-CT 1548 under ambient conditions Spectrum NIR spectrum of opal-CT 1548 under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1548 at low temperature

Spectrum NIR spectrum of opal-CT 1548 at low temperature Spectrum NIR spectrum of opal-CT 1548 at low temperature

Sub-Experiment opal-CT 1551: Tamb, low T, low P

Sub-Experiment NIR spectra of opal-CT 1551 in ambient conditions

Spectrum NIR spectrum of opal-CT 1551 under ambient conditions Spectrum NIR spectrum of opal-CT 1551 under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1551 at low temperature

Spectrum NIR spectrum of opal-CT 1551 at low temperature Spectrum NIR spectrum of opal-CT 1551 at low temperature

Sub-Experiment NIR spectra of opal-CT 1551 at low pressure

Spectrum NIR spectrum of opal-CT 1551 at low pressure Spectrum NIR spectrum of opal-CT 1551 at low pressure

Sub-Experiment opal-CT 1552a: Tamb, low T, low P

Sub-Experiment NIR spectra of opal-CT 1552a in ambient conditions

Spectrum NIR spectrum of opal-CT 1552a under ambient conditions Spectrum NIR spectrum of opal-CT 1552a under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1552a at low temperature

Spectrum NIR spectrum of opal-CT 1552a at low temperature Spectrum NIR spectrum of opal-CT 1552a at low temperature

Sub-Experiment NIR spectra of opal-CT 1552a at low pressure

Spectrum NIR spectrum of opal-CT 1552a at low pressure Spectrum NIR spectrum of opal-CT 1552a at low pressure

Sub-Experiment opal-CT 1552b: Tamb, low T

Sub-Experiment NIR spectra of opal-CT 1552b in ambient conditions

Spectrum NIR spectrum of opal-CT 1552b under ambient conditions Spectrum NIR spectrum of opal-CT 1552b under ambient conditions

Sub-Experiment NIR spectra of opal-CT 1552b at low temperature

Spectrum NIR spectrum of opal-CT 1552b at low temperature Spectrum NIR spectrum of opal-CT 1552b at low temperature

Sub-Experiment opal-A 1039: Tamb, low T

Sub-Experiment NIR spectra of opal-A 1039 in ambient conditions

Spectrum NIR spectrum of opal-A 1039 under ambient conditions Spectrum NIR spectrum of opal-A 1039 under ambient conditions

Sub-Experiment NIR spectra of opal-A 1039 at low pressure

Spectrum NIR spectrum of opal-A 1039 at low pressure Spectrum NIR spectrum of opal-A 1039 at low pressure

Sub-Experiment opal-CT VTB: Tamb, low P

Sub-Experiment NIR spectra of opal-CT VTB in ambient conditions

Spectrum NIR spectrum of opal-CT VTB under ambient conditions Spectrum NIR spectrum of opal-CT VTB under ambient conditions

Sub-Experiment NIR spectra of opal-CT VTB at low pressure

Spectrum NIR spectrum of opal-CT VTB at low pressure Spectrum NIR spectrum of opal-CT VTB at low pressure

Sub-Experiment opal-CT WT86: Tamb, low P

Sub-Experiment NIR spectra of opal-CT WT86 in ambient conditions

Spectrum NIR spectrum of opal-CT WT86 under ambient conditions Spectrum NIR spectrum of opal-CT WT86 under ambient conditions

Sub-Experiment NIR spectra of opal-CT WT86 at low pressure

Spectrum NIR spectrum of opal-CT WT86 at low pressure Spectrum NIR spectrum of opal-CT WT86 at low pressure

Sub-Experiment opal-CT YM12: Tamb, low P

Sub-Experiment NIR spectra of opal-CT YM12 in ambient conditions

Spectrum NIR spectrum of opal-CT YM12 under ambient conditions Spectrum NIR spectrum of opal-CT YM12 under ambient conditions

Sub-Experiment NIR spectra of opal-CT YM12 at low pressure

Spectrum NIR spectrum of opal-CT YM12 at low pressure Spectrum NIR spectrum of opal-CT YM12 at low pressure

Sub-Experiment opal-CT FT1111: Tamb, low T

Sub-Experiment NIR spectra of opal-CT FT1111 in ambient conditions

Spectrum NIR spectrum of opal-CT FT1111 under ambient conditions Spectrum NIR spectrum of opal-CT FT1111 under ambient conditions

Sub-Experiment NIR spectra of opal-CT FT1111 at low pressure

Spectrum NIR spectrum of opal-CT FT1111 at low pressure Spectrum NIR spectrum of opal-CT FT1111 at low pressure

Sample

Name: CT-YM12

Owner of sample

Database

GhoSST

Experimentalists

Boris Chauviré

Origin of sample

Date: 2017-01-01

Body name: Earth
Terrain type: mineral surface
Place: Mezezo , Ethiopia

Coordinates

System: WGS84

Physical characteristics

Thickness: 184.0 $\pm$ 5.0 ${\mu}m$
Sample changes: Opal releases molecular water at low pressure, inducing changes on all bands. However, this dehydration is not systematic.

Sample environment: Temperature

Temperature: 20.0 $\pm$ 3.0 $^{\circ}C$

Sample environment: Fluid

Type: ambient air
Fluid temperature: 20.0 $\pm$ 3.0 $^{\circ}C$
Fluid pressure: 1.0 $\pm$ 0.05 $bar$

Sample environment: Mechanical pressure

Pressure: 7.7 $\pm$ 0.5 $mbar$
Comments: The low-pressure (stabilized between 7.2 and 8.3 mbar) was maintained for a minimal period of 3 hours (for samples with no reaction visible in the spectra) or until steady state is reached and visible in the spectra (up to 23 hours).

Documentation and publication

Publications

Chauviré et al., 2021, Earth Planet. Sci. Lett., 576, 117239

Layers in sample

Number

1

Layers

Layer #1 , 184.0 ${\mu}m$