Characterization of heavy metal incorporation in calcite by XAFS spectroscopy

被引：22

作者：

Lamble, GM

Reeder, RJ

Northrup, PA

机构：

[1] BROOKHAVEN NATL LAB,UPTON,NY 11973

[2] SUNY STONY BROOK,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794

来源：

JOURNAL DE PHYSIQUE IV | 1997年 / 7卷 / C2期

关键词：

D O I：

10.1051/jp4:1997238

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 al 2.11-2.12 Angstrom. 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.

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收藏

页码：793 / 797

页数：5

相关论文

共 16 条

[1] ABINITIO CURVED-WAVE X-RAY-ABSORPTION FINE-STRUCTURE [J].

DELEON, JM ;

REHR, JJ ;

ZABINSKY, SI ;

ALBERS, RC .

PHYSICAL REVIEW B, 1991, 44 (09) :4146-4156

[2] IRON AND MANGANESE INCORPORATION INTO CALCITE - EFFECTS OF GROWTH-KINETICS, TEMPERATURE AND SOLUTION CHEMISTRY [J].

DROMGOOLE, EL ;

WALTER, LM .

CHEMICAL GEOLOGY, 1990, 81 (04) :311-336

[3] CRYSTAL-STRUCTURE REFINEMENTS OF MAGNESITE, CALCITE, RHODOCHROSITE, SIDERITE, SMITHONITE, AND DOLOMITE, WITH DISCUSSION OF SOME ASPECTS OF THE STEREOCHEMISTRY OF CALCITE TYPE CARBONATES [J].

EFFENBERGER, H ;

MEREITER, K ;

ZEMANN, J .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1981, 156 (3-4) :233-243

[4] STEP DYNAMICS AND SPIRAL GROWTH ON CALCITE [J].

GRATZ, AJ ;

HILLNER, PE ;

HANSMA, PK .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1993, 57 (02) :491-495

[5] OPERATION OF A DYNAMICALLY BENT SAGITTALLY FOCUSING DOUBLE CRYSTAL MONOCHROMATOR FOR XAFS STUDIES [J].

LAMBLE, GM ;

HEALD, SM .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1992, 63 (01) :880-884

[6] SR, CD, MN AND CO DISTRIBUTION COEFFICIENTS IN CALCITE AS A FUNCTION OF CALCITE PRECIPITATION RATE [J].

LORENS, RB .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1981, 45 (04) :553-561

[7] PARTITION-COEFFICIENTS IN CALCITE - EXAMINATION OF FACTORS INFLUENCING THE VALIDITY OF EXPERIMENTAL RESULTS AND THEIR APPLICATION TO NATURAL SYSTEMS [J].

MORSE, JW ;

BENDER, ML .

CHEMICAL GEOLOGY, 1990, 82 (3-4) :265-277

[8]

MUCCI A, 1990, REV AQUAT SCI, V3, P217

[9] RELATIONSHIP BETWEEN SURFACE-STRUCTURE, GROWTH-MECHANISM, AND TRACE-ELEMENT INCORPORATION IN CALCITE [J].

PAQUETTE, J ;

REEDER, RJ .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1995, 59 (04) :735-749

[10] STRUCTURES OF HYDROTHERMALLY SYNTHESIZED COBALT(II) CARBONATE AND NICKEL(II) CARBONATE [J].

PERTLIK, F .

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1986, 42 :4-5