Low-temperature Synthesis of Micas Under Conventional- and Microwave-Hydrothermal Conditions
Abstract:Several micas containing different octahedral and interlayer cations were synthesized at different temperatures under conventional-and microwave-hydrothermal conditions and these phases were characterized by powder X-ray diffraction, solid-state magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy, scanning electron microscopy and Fourier transform infrared spectroscopy. A Zn K-mica with Zn in the octahedral sheets and K in the interlayers was synthesized in the temperature range 150 -200ºC and a novel Zn Rb-mica with Zn in the octahedral sheets and Rb in the interlayers was synthesized at 200ºC. The synthesis of either M g,Co or Ni K-micas,however,was found to be difficultor impossible at these low temperatures. Solid-state 29Si M AS-NMR revealed that the Al in the tetrahedral sites is disordered with several nearest-neighbor Si environments. In general, microwave-assisted hydrothermal conditions led to better crystallization of the Zn K-micas compared with the conventional method.
Document Type: Research Article
Publication date: 2003-12-01
More about this publication?
- The JOURNAL publishes articles of interest to the international community of clay scientists, including but not limited to areas in mineralogy, crystallography, geology, geochemistry, sedimentology, soil science, agronomy, physical chemistry, colloid chemistry, ceramics, petroleum engineering, foundry engineering, and soil mechanics. Clays and Clay Minerals exists to disseminate to its worldwide readership the most recent developments in all of these aspects of clay materials. Manuscripts are welcome from all countries.
Clays and Clay Minerals is the official publication of The Clay Minerals Society.
The Editor-in-Chief is Professor Joseph W. Stucki firstname.lastname@example.org
- Editorial Board
- Information for Authors
- Membership Information
- Annual Meeting of The Clay Minerals Society
- Ingenta Connect is not responsible for the content or availability of external websites