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Effect of interlayer cations on high-temperature phases of vermiculite.
- Source :
- Journal of Thermal Analysis & Calorimetry; Apr2006, Vol. 84 Issue 1, p147-155, 9p, 2 Charts, 14 Graphs
- Publication Year :
- 2006
-
Abstract
- Static and dynamic heating of vermiculite samples from Santa Olalla, Huelva, Spain, saturated with different cations, i.e. Na<superscript>+</superscript>, Cs<superscript>+</superscript>, NH<subscript>4</subscript> <superscript>+</superscript>, Mg<superscript>2+</superscript>, Ca<superscript>2+</superscript>, Ba<superscript>2+</superscript> and Al<superscript>3+</superscript>, have been studied. The characterization of the phases formed during heating has been carried out by X-ray diffraction. The phases formed depend on the cation present in the interlamellar position and the heating process. The phases identified in the vermiculite samples saturated with different cations and heated at different temperatures are the following: enstatite, forsterite, spinel, cordierite, anorthite, pollucite, nepheline, coesite, celsian and others various mixed silicates; also some dehydrated and amorphous phases have been observed. On static heating, at the maximum temperature reached in this work, the phases formed appear mixed with a glassy phase. [ABSTRACT FROM AUTHOR]
- Subjects :
- HEATING
HIGH temperatures
VERMICULITE
CLAY minerals
CATIONS
Subjects
Details
- Language :
- English
- ISSN :
- 13886150
- Volume :
- 84
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of Thermal Analysis & Calorimetry
- Publication Type :
- Academic Journal
- Accession number :
- 20467571
- Full Text :
- https://doi.org/10.1007/s10973-005-7194-6