The reduction of aqueous Au3+ by sulfide minerals and green rust phases

D. M. Heasman; D. M. Sherman; K. V. Ragnarsdottir

doi:10.2138/am-2003-5-602

The reduction of aqueous Au³⁺ by sulfide minerals and green rust phases

D. M. Heasman
, D. M. Sherman
, K. V. Ragnarsdottir

Faculty of Earth Sciences

University of Iceland

Research output: Contribution to journal › Article › peer-review

Abstract

The reactions of Au³⁺ with green rust, stibnite, pyrite, and chalcopyrite were investigated in the laboratory and the size of the gold clusters formed was measured using extended X-ray absorption fine structure (EXAFS) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The individual clusters produced were between approximately 29 Å and 77 Å in diameter and may occur individually or as composite clusters from hundreds to thousands of angstroms in size. This work shows that it is possible to form "invisible" gold through reduction of Au³⁺ by green rust phases and the surfaces of sulfide minerals.

Original language	English
Pages (from-to)	725-738
Number of pages	14
Journal	American Mineralogist
Volume	88
Issue number	5
DOIs	https://doi.org/10.2138/am-2003-5-602
Publication status	Published - May 2003

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10.2138/am-2003-5-602

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abstract = "The reactions of Au3+ with green rust, stibnite, pyrite, and chalcopyrite were investigated in the laboratory and the size of the gold clusters formed was measured using extended X-ray absorption fine structure (EXAFS) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The individual clusters produced were between approximately 29 {\AA} and 77 {\AA} in diameter and may occur individually or as composite clusters from hundreds to thousands of angstroms in size. This work shows that it is possible to form {"}invisible{"} gold through reduction of Au3+ by green rust phases and the surfaces of sulfide minerals.",

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N2 - The reactions of Au3+ with green rust, stibnite, pyrite, and chalcopyrite were investigated in the laboratory and the size of the gold clusters formed was measured using extended X-ray absorption fine structure (EXAFS) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The individual clusters produced were between approximately 29 Å and 77 Å in diameter and may occur individually or as composite clusters from hundreds to thousands of angstroms in size. This work shows that it is possible to form "invisible" gold through reduction of Au3+ by green rust phases and the surfaces of sulfide minerals.

AB - The reactions of Au3+ with green rust, stibnite, pyrite, and chalcopyrite were investigated in the laboratory and the size of the gold clusters formed was measured using extended X-ray absorption fine structure (EXAFS) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The individual clusters produced were between approximately 29 Å and 77 Å in diameter and may occur individually or as composite clusters from hundreds to thousands of angstroms in size. This work shows that it is possible to form "invisible" gold through reduction of Au3+ by green rust phases and the surfaces of sulfide minerals.

UR - https://www.scopus.com/pages/publications/0037530642

U2 - 10.2138/am-2003-5-602

DO - 10.2138/am-2003-5-602

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SP - 725

EP - 738

JO - American Mineralogist

JF - American Mineralogist

IS - 5

ER -

The reduction of aqueous Au3+ by sulfide minerals and green rust phases

Abstract

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The reduction of aqueous Au³⁺ by sulfide minerals and green rust phases