Smectite SWy-2 with 3.32% adsorbed-interlayer H2O | GhoSST | SSHADE

Sample

Name: Smectite SWy-2 with 3.32% adsorbed-interlayer H2O

Owner of sample

Database

GhoSST

Experimentalists

Antoine Pommerol

Origin of sample

Date: 2007-01-01
Provider: IPAG
Previous sample: Smectite SWy-2 with 3.39% adsorbed-interlayer H2O
Parent sample: Smectite SWy-2 with 1.44% adsorbed-interlayer H2O

Pictures of the 25-50µm grain size fraction of SWy-2 smectite particles taken under a binocular microscope at three different zoom levels (zoom level increases from left (5mm FS) to right (1mm FS))

Physical characteristics

Thickness: 1.0 $\pm$ 0.1 $mm$
Diameter: 30.0 $mm$
Volume: 700.0 $mm^3$
Mass: 0.473 $\pm$ 0.0903 $g$
Surface roughness: low
Substrate material: aluminum anodized black
Substrate comments: depth 1mm
Comments: Mass of dry sample = 0.46g

Sample environment: Temperature

Temperature: 243.1 $\pm$ 0.5 $K$
Time at T: 0.0 $min$
Temperature max: 443.0 $K$
Time at Tmax: 600.0 $min$
Comments: Sample temperature error is mostly due to possible vertical temperature gradient in the sample. Temperature reading accuracy and stability is 0.1K - Small pressure applied during sample flattening with a spatula

Sample environment: Fluid

Type

molecular gas

Fluids

$H_2O$ 100.0 %

Fluid temperature

243.0

\pm

$\pm$ 5.0

K

$K$

Fluid pressure

0.105

\pm

$\pm$ 0.0011

m b a r

$mbar$

Comments

P/Ps = 0.284 +/- 0.028 - Max fuid pressure = 1.16e-1 mbar - Fluid temperature error depicts estimated thermal gradient of gas in the cell

Documentation and publication

Publications

Pommerol et al., 2009, Icarus, 204, 114 - 136

Layers in sample

Number

1

Arrangement

The sample holder is filled to rim with the non-compacted sample powder

Layers

Smectite SWy-2 with 3.32% adsorbed-interlayer H2O , 1.0 $mm$

Sample processings

Title

slight decrease pressure to

1.05 10^{- 1}

$1.05 10^{-1}$ mbar

Precursors

Materials

Na-Montmorillonite with adsorbed and interlayer water

Produced sample

Materials

Na-Montmorillonite with adsorbed and interlayer water

Processing steps

Step	Chronology	Date	Type	Process	Changes
#1	on parent sample	2007-01-01	fluid physical	slight decrease pressure to $1.05 10^{-1}$ mbar	adding adsorbed/interlayer $H_2O$

Comments

negligible adsorption assumed on the other materials