| Mineral: |
Al-Goethite |
| Reference: |
XKWXH19 |
| Preparation: |
A series of mixed solutions of 0.5 M Fe(NO3)3·9H2O with variable Al(NO3)3·9H2O were prepared with the Al/(Al + Fe) molar ratios in solution adjusted to 0, 10 and 15 mol% Al. A 2.5 M NaOH solution was added to 100 mL of the mentioned solutions at a rate of 10 mL min−1 until the final pH was 13.00 ± 0.05. The suspensions were stirred for 30 min and then aged for 14 days at 70 °C. After aging, the suspended solids were washed with boiled Milli-Q water until the conductivity was less than 2 μS cm−1 . After that, the samples were freeze-dried and stored in polypropylene containers in a closed desiccator. |
| Crystallinity: |
more plate-like particles and crystals with irregular edges in addition to acicular ones |
| Dimension: |
length: 120 nm, width: 39 nm |
| Purity: |
no evidence for other iron(hydr)oxides |
| Composition: |
the molar Al/Fe + Al ratio of the coprecipitate was 8.67% |
| Sample characterized via: |
☑ Scanning electron microscope (SEM)
☑ Transmission electron microscopy (TEM)
☑ X-ray Diffraction (XRD)
|
| Comment: |
G-9 |
| |
