Homogene Keimbildung und Keimwachstum von γ-MnO2
Fast oxidation of Mn2+ in an acid solution by S2O82- leads to spheres of agglomerated, very small crystallites of γ-MnO2. When the supersaturation in manganese begins to drop, needles grow out of the initial spheres and the familiar hedgehog-like particles form. Crystallite growth can be further en...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Swiss Chemical Society
1976-05-01
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| Series: | CHIMIA |
| Online Access: | https://www.chimia.ch/chimia/article/view/9311 |
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| Summary: | Fast oxidation of Mn2+ in an acid solution by S2O82- leads to spheres of agglomerated, very small crystallites of γ-MnO2. When the supersaturation in manganese begins to drop, needles grow out of the initial spheres and the familiar hedgehog-like particles form. Crystallite growth can be further enhanced by heating the γ-MnO2 in suspension with 2N HNO3 under reflux. Extended recrystallization, however, leads to nucleation of β-MnO2 and the sample eventually transforms entirely into this phase.
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| ISSN: | 0009-4293 2673-2424 |