Crystal faces of anhydrite (CaSO4) and their preferential dissolution in aqueous solutions studied with AFM

H. Shindo, M. Kaise, H. Kondoh, C. Nishihara, H. Nozoye

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Structures of cleaved surfaces of anhydrite were studied with atomic force microscopy (AFM) before and after partial dissolution in aqueous solutions of NH4Cl and NaHSO4. Two crystal faces showed atom-resolved images just after cleavage, (100) and (010), of which the former was roughened by the dissolution, while step structures were developed on the latter. After dissolution, steplines ran along the a- and c-axes on the (010) face, while they ran in directions inclined to these axes before. It was revealed that the arrangement of dipoles is a key factor in determining stabilities of step structures on crystal faces. On the terraces, the arrangement of oxygen atoms of the sulfate groups and calcium ions were clearly observed.

本文言語English
ページ(範囲)491-497
ページ数7
ジャーナルApplied Surface Science
60-61
C
DOI
出版ステータスPublished - 1992
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 物理学および天文学(全般)
  • 表面および界面
  • 表面、皮膜および薄膜

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