Portlandite 96% Sigma-Aldrich 10C vacuum | GhoSST | SSHADE

Sample

Name: Portlandite 96% Sigma-Aldrich 10C vacuum

Owner of sample

Database

GhoSST

Experimentalists

Alexandre Garenne

Origin of sample

Date: 2011-05-24
Provider: IPAG

Physical characteristics

Substrate material: KBr window, 3mm thickness, 12mm diameter
Comments: dispersion of agglomerate grains on the substrate

Sample environment: Temperature

Temperature: 10.0 $\pm$ 0.1 $^{\circ}C$
Time at T: 20.0 $\pm$ 5.0 $min$
Temperature max: 22.0 $\pm$ 2.0 $^{\circ}C$
Time at Tmax: 10.0 $min$

Sample environment: Fluid

Type

vacuum

Fluids

Primary vacuum - ~1e-2 mbar 100.0 $\pm$ 0.1 %

Fluid temperature

10.0

$\pm$ 0.1

$^{\circ}C$

Fluid pressure

0.0e+00

$bar$

Time at T, P, pH

10.0

$\pm$ 1.0

$min$

Documentation and publication

Publications

Garenne et al., 2013, Planet. Space Sci., 76, 28 - 41

Layers in sample

Number

1

Layers

Layer #1

Sample processings

Title

Cooling the sample at 10°C after freezing during pumping air in an environmental cell

Precursors

Matters

Portlandite 96% Sigma-Aldrich

Produced sample

Materials

Portlandite - Calcite - Aragonite

Processing steps

Step	Chronology	Date	Type	Process	Changes
#1	during layer formation	2011-05-24	layer formation	slightly compressed grains	dispersed agglomerate of grains placed in the cell under ambient temperature and air. Manual compression
#2	after sample formation	2011-05-24	chemical	kept 10 min under ambient temperature and air (H2O and CO2)	The carbonation process started during and after sample preparation under ambiant air. Slight reaction of CO2 with Portlandite
#3	on parent sample	2011-05-24	thermal	cooling of the sample to -60°C	adsorption of water and condensation of ice on the minerals
#4	on parent sample	2011-05-24	fluid physical	removal of air in the chamber: vacuum 1e-5 mbar during 10 min	some loss of adsorbed water and ice
#5	on parent sample	2011-05-24	thermal	heating of the sample to 10°C	melting of ice and some loss of adsorbed and liquid water