Photoernission studies of polymorphic CaCO3 materials

被引：141

作者：

Gopinath, CS ^{[1
]}

Hegde, SG

Ramaswamy, AV

Mahapatra, S

机构：

[1] Natl Chem Lab, Catalysis Div, Pune 411008, Maharashtra, India

[2] Unilever Res India, Hindustan Lever Res Ctr, Bombay 400099, Maharashtra, India

来源：

MATERIALS RESEARCH BULLETIN | 2002年 / 37卷 / 07期

关键词：

inorganic compounds; photoelectron spectroscopy; surface properties; electronic structure;

D O I：

10.1016/S0025-5408(02)00763-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The surface analysis of polymorphic calcium carbonate (CaC0(3)) compounds, namely, calcite, aragonite, and vaterite were carried out by X-ray photoelectron spectroscopy (XPS). XPS results clearly demonstrate that vaterite is different from the other two and exhibit a low binding energy (BE) for all its constituent elements. It is attributed to the perpendicular orientation Of CO32- to ab plane in vaterite. Aragonite shows less calcium and more oxygen and indicates the surface is carbonate terminated. Intergrowth of calcite and aragonite and natural dolomite samples were also analysed and compared with the above CaCO3 compounds. Ca:Mg = 3 suggest that the dolomite surface is dominated by Ca. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1323 / 1332

页数：10

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