Characterization of heavy metal incorporation in calcite by XAFS spectroscopy

G. M. Lamble; R. J. Reeder; P. A. Northrup

doi:10.1051/jp4:1997238

Characterization of heavy metal incorporation in calcite by XAFS spectroscopy

G. M. Lamble
, R. J. Reeder
, P. A. Northrup

Geosciences

Brookhaven National Laboratory
Lawrence Berkeley National Laboratory

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

15 Scopus citations

Abstract

Zn and Co K-edge XAFS have been analyzed for spectra obtained from synthetic calcite that incorporated trace amounts of Zn²⁺ and Co²⁺ during growth from aqueous solutions at room temperature. Zn and Co concentrations in the calcite ranged from 250 to 2150 ppm. Analysis of the first shells indicates that the immediate coordination of both metal ions is approximately six oxygens at 2.11-2.12 Å. These results are consistent with octahedral coordination at the unique Ca site in calcite. The observation that Co and Zn attain similar coordination in the bulk following incorporation suggests that their strongly contrasting surface site preferences are not expressed after being buried by subsequent growth layers.

Original language	English
Pages (from-to)	C2-793-C2-797
Journal	Journal De Physique. IV : JP
Volume	7
Issue number	2 Part 2
DOIs	https://doi.org/10.1051/jp4:1997238
State	Published - 1997

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title = "Characterization of heavy metal incorporation in calcite by XAFS spectroscopy",

abstract = "Zn and Co K-edge XAFS have been analyzed for spectra obtained from synthetic calcite that incorporated trace amounts of Zn2+ and Co2+ during growth from aqueous solutions at room temperature. Zn and Co concentrations in the calcite ranged from 250 to 2150 ppm. Analysis of the first shells indicates that the immediate coordination of both metal ions is approximately six oxygens at 2.11-2.12 {\AA}. These results are consistent with octahedral coordination at the unique Ca site in calcite. The observation that Co and Zn attain similar coordination in the bulk following incorporation suggests that their strongly contrasting surface site preferences are not expressed after being buried by subsequent growth layers.",

author = "Lamble, \{G. M.\} and Reeder, \{R. J.\} and Northrup, \{P. A.\}",

year = "1997",

doi = "10.1051/jp4:1997238",

language = "English",

volume = "7",

pages = "C2--793--C2--797",

journal = "Journal De Physique. IV : JP",

issn = "1155-4339",

number = "2 Part 2",

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TY - JOUR

T1 - Characterization of heavy metal incorporation in calcite by XAFS spectroscopy

AU - Lamble, G. M.

AU - Reeder, R. J.

AU - Northrup, P. A.

PY - 1997

Y1 - 1997

N2 - Zn and Co K-edge XAFS have been analyzed for spectra obtained from synthetic calcite that incorporated trace amounts of Zn2+ and Co2+ during growth from aqueous solutions at room temperature. Zn and Co concentrations in the calcite ranged from 250 to 2150 ppm. Analysis of the first shells indicates that the immediate coordination of both metal ions is approximately six oxygens at 2.11-2.12 Å. These results are consistent with octahedral coordination at the unique Ca site in calcite. The observation that Co and Zn attain similar coordination in the bulk following incorporation suggests that their strongly contrasting surface site preferences are not expressed after being buried by subsequent growth layers.

AB - Zn and Co K-edge XAFS have been analyzed for spectra obtained from synthetic calcite that incorporated trace amounts of Zn2+ and Co2+ during growth from aqueous solutions at room temperature. Zn and Co concentrations in the calcite ranged from 250 to 2150 ppm. Analysis of the first shells indicates that the immediate coordination of both metal ions is approximately six oxygens at 2.11-2.12 Å. These results are consistent with octahedral coordination at the unique Ca site in calcite. The observation that Co and Zn attain similar coordination in the bulk following incorporation suggests that their strongly contrasting surface site preferences are not expressed after being buried by subsequent growth layers.

UR - https://www.scopus.com/pages/publications/33750671781

U2 - 10.1051/jp4:1997238

DO - 10.1051/jp4:1997238

M3 - Article

AN - SCOPUS:33750671781

SN - 1155-4339

VL - 7

SP - C2-793-C2-797

JO - Journal De Physique. IV : JP

JF - Journal De Physique. IV : JP

IS - 2 Part 2

ER -

Characterization of heavy metal incorporation in calcite by XAFS spectroscopy

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