- Database
- Experimentalists
- Date
- 2014-11-16
- 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
-
- N2 5.0 AirProducts 97.9 $\pm$ 0.5 %
- D2O 2.1 $\pm$ 0.5 %
- 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
- Number
- 1
- Layers
- Title
- D2O saturation of smectite
- Matters
- Sample
- Mg-exchanged smectite saturated with D2O at RH=75% (this sample)
- Processing steps
-
Step Chronology Date Type Process Changes #1 before layer formation 2014-11-16 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 Na-montmorillonite. Dispersing a Na-montmorillonite with adsorbed H2O in liquid D2O leads to exchange of interlayer H2O with D2O. #2 during layer formation 2014-11-16 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 (montmorillonite) on top of the ATR crystal #3 during layer formation 2014-11-16 fluid physical Saturation of the sample thin film with D2O-wet nitrogen gas (75% relative humidity) for 15 $\pm$ 5 min at room p,T. Saturation of interlayer of montmorillonite space with D2O molecules