| Mineral: |
Birnessite |
| Reference: |
EV15 |
| Preparation: |
synthesized using the method of McKenzie (1971). A 1.0 mol/L KMnO4 solution was brought to a boil. To this was slowly added 165 mL of 12.1 mol/L HCl.
The suspension was boiled for an additional 10 min following the HCl addition. The resulting precipitate was centrifuge washed with 1 mmol/L HCl until pH 5 was obtained. The solid was
then centrifuge washed with 10 mmol/L KNO3 until all traces of Cl− ion were removed as determined by a AgNO3 test. The solid was then stored in the 10 mmol/L KNO3 suspension at ambient temperature. |
| Crystallinity: |
poorly crystalline |
| Purity: |
without any detectable impurities |
| Sample characterized via: |
☑ X-ray Diffraction (XRD)
|
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