| Abstract: | A precipitate of cobalt oxyhydroxides formed by bubbling oxygen through a dilute solution of Co(NO3)2 held at pH 9.0 and 25??C was aged for 23 months in contact with the original solution, with access to atmospheric oxygen. Co3O4 and CoOOH were identified in the precipitate by X-ray diffraction. Chemical equilibria involving these solids were evaluated by measurements of solution pH and Co2+ activities and by redox potential measurements and gave a ??GcoOOH0 of -92.3 ?? 0.5 kcal/mole. This value and other thermodynamic data show relative feasibility of hypothetical reaction steps and changes in reaction paths during automated coprecipitation titrations and subsequent aging of a precipitate that finally contained ??MnOOH, MnO2 (birnessite) and CoOOH. ?? 1985. |
| Genre: | Article |
| ProdID: | 70012732 |
| Citation Author: | Hem, J. D.; Roberson, C. E.; Lind, C. J. |
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| Citation End Page: | 810 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geochimica et Cosmochimica Acta |
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| Citation Number Of Pages: | 10 |
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| Citation Search Results Text: | Thermodynamic stability of CoOOH and its coprecipitation with manganese; 1985; Article; Journal; Geochimica et Cosmochimica Acta; Hem, J. D.; Roberson, C. E.; Lind, C. J. |
| Citation Start Page: | 801 |
| Citation Volume: | 49 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | Thermodynamic stability of CoOOH and its coprecipitation with manganese; 1985; Article; Journal; Geochimica et Cosmochimica Acta; Hem, J. D.; Roberson, C. E.; Lind, C. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
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