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

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

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)491-497
Number of pages7
JournalApplied Surface Science
Volume60-61
Issue numberC
DOIs
Publication statusPublished - 1992
Externally publishedYes

Fingerprint

Atomic force microscopy
dissolving
Dissolution
atomic force microscopy
aqueous solutions
Crystals
crystals
Atoms
Sulfates
calcium
cleavage
Calcium
sulfates
oxygen atoms
Ions
Oxygen
dipoles
atoms
ions
Direction compound

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Crystal faces of anhydrite (CaSO4) and their preferential dissolution in aqueous solutions studied with AFM. / Shindo, H.; Kaise, M.; Kondoh, Hiroshi; Nishihara, C.; Nozoye, H.

In: Applied Surface Science, Vol. 60-61, No. C, 1992, p. 491-497.

Research output: Contribution to journalArticle

Shindo, H. ; Kaise, M. ; Kondoh, Hiroshi ; Nishihara, C. ; Nozoye, H. / Crystal faces of anhydrite (CaSO4) and their preferential dissolution in aqueous solutions studied with AFM. In: Applied Surface Science. 1992 ; Vol. 60-61, No. C. pp. 491-497.
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