THE OCCURRENCE OF SULFUR AND PHOSPHORUS WITHIN BACTERIALLY DERIVED CRYSTALLINE AND PSEUDOCRYSTALLINE OCTAHEDRAL GOLD FORMED IN VITRO
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dc.contributor.author | Southam G. | |
dc.contributor.author | Beveridge T.J. | |
dc.date.accessioned | 2020-12-05T10:57:23Z | |
dc.date.available | 2020-12-05T10:57:23Z | |
dc.date.issued | 1996 | |
dc.identifier | https://elibrary.ru/item.asp?id=31682831 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1996, , 22, 4369-4376 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/20456 | |
dc.description.abstract | A temperature study (4°C, room temperature, 60°C and 90°C) employing a bacterial in vitro model (Southam and Beveridge, 1994) revealed a role for S and P in octahedral An formation. Ionic Au immobilized by Bacillus subtilis 168 was first precipitated as colloidal Au. During diagenesis, these colloids were transformed into spherical pseudocrystalline gold particles composed of 74.56 ± 2.60 at% Au, 8.56 ± 1.71 at% S, and 13.94 ± 1.48 at% P. These minerals then aggregated as roughly shaped noncrystalline octahedral Au which was subsequently transformed into crystalline octahedral Au containing 85.37 ± 0.16 at% Au (the maximum detected[, 0.77 ± 1.33 at% S, and 10.27 ± 0.88 at% P. The strong P signals (13.39 ± 2.01 average at%[ obtained from the Au minerals examined by energy-dispersive X-ray spectroscopy suggest that organic phosphate compounds also play a role in the in vitro development of octahedral Au, possibly as bacteria-Au-complexing agents. Increasing the time to 4 weeks at room temperature or the temperature to either 60°C or 90°C enhanced formation of the crystalline octahedral gold. This crystalline octahedral Au generated an electron diffraction pattern consistent with synthetic Au. | |
dc.title | THE OCCURRENCE OF SULFUR AND PHOSPHORUS WITHIN BACTERIALLY DERIVED CRYSTALLINE AND PSEUDOCRYSTALLINE OCTAHEDRAL GOLD FORMED IN VITRO | |
dc.type | Статья |
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