Sample
Name
Ca-exchanged smectite saturated with H2O at RH=90%
Date
2014-11-24
Provider
CML laboratory
Thickness
0.01 $\pm$ 0.005 $cm$
Diameter
0.5 $cm$
Substrate material
Diamond
Substrate comments
Sample was in the custom made environmental chamber with controlled relative humidity of H2O vapor
Comments
Thin film deposited on top of ATR crystal
Temperature
25.0 $\pm$ 3.0 $C$
Time at T
20.0 $\pm$ 3.0 $min$
Temperature max
25.0 $\pm$ 3.0 $C$
Pressure
1013.0 $\pm$ 15.0 $hPa$
Time at P
20.0 $\pm$ 3.0 $min$
Comments
Sample kept under room temperature and pressure
Type
molecular gas
Fluids
Fluid temperature
25.0 $\pm$ 3.0 $C$
Time at T, P, pH
20.0 $\pm$ 3.0 $min$
Comments
Fluid type: Nitrogen wet with H2O vapor
Title
H2O saturation of smectite

Precursors

Matters

Produced sample

Sample
Ca-exchanged smectite saturated with H2O at RH=90%
Processing steps
Step Chronology Date Type Process Changes
#1 before layer formation 2014-11-24 fluid physical Dispersion in liquid H2O (99.99% atomic) for 5+/-1 min in closed vial ultrasonic bath under room p,T. Solid:liquid ratio = 1:0.5 (mg/ml). Creation of a stable dispersion of Ca-exchanged smectite.
#2 during layer formation 2014-11-24 fluid physical Deposition of a 0.05 $\pm$ 0.02 ml of dispersion in an environmental chamber flown with N2 gas (purity 5.0) at 500 $\pm$ 100 ml/min rate for 20 $\pm$ 5 min at room p,T Formation of a thin film of a sample (smectite) on top of the ATR crystal
#3 during layer formation 2014-11-24 fluid physical Saturation of the sample thin film with H2O-wet nitrogen gas (90% relative humidity) for 15 $\pm$ 5 min at room p,T. Saturation of interlayer of smectite space with H2O molecules