Sample
Name
Mg-exchanged smectite saturated with D2O at RH=80%
Date
2014-11-18
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 D2O vapor
Comments
Thin film deposited on top of ATR crystal
Temperature
25.0 $\pm$ 3.0 $^{\circ}C$
Time at T
20.0 $\pm$ 3.0 $min$
Temperature max
25.0 $\pm$ 3.0 $^{\circ}C$
Comments
Sample kept under room temperature and pressure
Type
molecular gas
Fluids
Fluid temperature
25.0 $\pm$ 3.0 $^{\circ}C$
Fluid pressure
1013.0 $\pm$ 15.0 $hPa$
Time at T, P, pH
20.0 $\pm$ 3.0 $min$
Comments
Fluid type: Nitrogen wet with D2O vapor
Title
D2O saturation of smectite

Precursors

Matters

Produced sample

Sample
Mg-exchanged smectite saturated with D2O at RH=80% (this sample)
Processing steps
Step Chronology Date Type Process Changes
#1 before layer formation 2014-11-18 fluid physical Dispersion in liquid D2O (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 Mg-exchanged smectite. Dispersing a Mg-exchanged smectite with adsorbed H2O in liquid D2O leads to exchange of interlayer H2O with D2O.
#2 during layer formation 2014-11-18 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 2014-11-18 fluid physical Saturation of the sample thin film with D2O-wet nitrogen gas (80% relative humidity) for 15 $\pm$ 5 min at room p,T. Saturation of interlayer of smectite space with D2O molecules