TEM study of synthetic hillebrandite (Ca2SiO4 • H2O)

Youn Joong Kim, Waltraud M. Kriven

Research output: Contribution to journalArticlepeer-review

Abstract

Hillebrandite (dicalcium silicate hydrate) was produced by a hydrothermal process. Its crystal structure and microstructures were investigated by conventional TEM and HREM. Most hillebrandite fibers showed their elongation to be parallel to the b axis and tended to lie on the {001} cleavage planes. Selected area diffraction patterns frequently displayed continuous streaking, and corresponding dark-field images revealed stacking disorders perpendicular to the fiber axis. The morphology, stacking disorders, and extinction conditions of {hko} reflections and hillebrandite resembled those of the minerals wollastonite (CaSiO3 and pectolite (Ca2NaH[SiO3]3). Periodic (100) faulting with a displacement vector 1/2 b is suggested to be the major origin of the streaking and the systematic absences in hillebrandite.

Original languageEnglish (US)
Pages (from-to)2948-2953
Number of pages6
JournalJournal of Materials Research
Volume8
Issue number11
DOIs
StatePublished - Nov 1993

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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