1980
DOI: 10.1346/ccmn.1980.0280507
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Crystal Chemistry of Boehmite

Abstract: Abstract--Thirty two boehmites, synthesized at temperatures ranging from room temperature to 300~ were examined by scanning electron microscopy, transmission electron microscopy, electron diffraction, X-ray powder diffraction, differential thermal analysis, and infrared spectroscopy. The results show that boehmite exhibits a continuous gradation in crystallite size ranging from single octahedral layers or a few unit cells to about 65 unit cells in the y-direction. This conclusion suggests that the term pseudob… Show more

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Cited by 181 publications
(131 citation statements)
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“…The starting material also contained amorphous product and a small amount of pseudoboehmite. The amount of pseudoboehmite was not determined because this phase is poorly crystallized and the temperature of dehydroxylation is close to that of kaolinite (Tettenhorst and Hofmann, 1980). Thermogravimetric analysis suggested --50% kaolinite in the product.…”
Section: Starting Materialsmentioning
confidence: 99%
“…The starting material also contained amorphous product and a small amount of pseudoboehmite. The amount of pseudoboehmite was not determined because this phase is poorly crystallized and the temperature of dehydroxylation is close to that of kaolinite (Tettenhorst and Hofmann, 1980). Thermogravimetric analysis suggested --50% kaolinite in the product.…”
Section: Starting Materialsmentioning
confidence: 99%
“…As indicated by EDX, the boehmite consisted mainly of A1 and very small amounts of Si. Such fibrous boehmite is well known as "pseudoboehmite", whose disordered structure is caused by random intercalation of water molecules into the octahedral layers (Tettenhorst and Hofmann 1980). Similar material can be easily produced by aging of amorphous Al-hydroxide prepared by neutralization of acidic solution containing A1 ions (Souza-Santos et al 1953;Violante and Huang 1985;Violante et al 1993).…”
Section: Reaction Products In Naoh Solutions At 200 ~mentioning
confidence: 99%
“…have a highly anisotropic shape, and the (200) plane is perpendicular to the direction of maximum growth (Tettenhorst and Hofmann, 1980). Peaks such as 200, additional h00 reflections, and other reflections from planes which make a small angle with the (200) plane are narrow compared with most of the other peaks.…”
Section: Neutron Diffraction Profilementioning
confidence: 99%