Dehydration and rehydration of magadiite and kenyaite

Katsunori Kosuge, Atsushi Yamazaki, Atsumu Tsunashima, Ryohei Otsuka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Dehydration and rehydration characteristics of synthetic magadiite and kenyaite were investigated in the temperature range from R.T. to 1000°C, and also under high vacuum at R.T. Magadiite and kenyaite lost interlayered water in the range of R.T.-600°C accompanied by a decrease in basal spacing. At 80°C-100°C, the 'intermediate' step of dehydration was observed for both compounds with a basal spacing of 14.1 angstrom for magadiite and 18.8 angstrom for kenyaite. Reversible rehydration took place completely after heating up to 250°C. The layered structures decomposed at 550°C for magadiite and at 600°C for kenyaite. Under high vacuum, interlayered water of both compounds was eliminated completely from the interlayer space at 10-5 Torr for 24 h at R.T. However, reversible rehydration was observed, when the 'collapsed' products were kept in atmospheric air for 24 h.

Original languageEnglish
Pages (from-to)738-742
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume100
Issue number1161
DOIs
Publication statusPublished - 1992 Jan 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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