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ATTAPULGITE: PROPERTIES AND USES by
attapulgite : PROPERTIES AND uses by W. L. HADEN, JR. Minerals and Chemicals Philipp Corporation, Menlo ]?ark, New Jersey ABSTRACT The clay mineral attapulgite derives its non-swelling needle-like morphology from its three-dimensional crystal structure. The shape and size of the needles result in unique colloidal PROPERTIES , especially resistance to high concentrations of electrolytes, and give high surface area, high porosity particles when thermally activated. Examples of industrial applications of attapulgite are reviewed with emphasis on how these character- istic PROPERTIES function in the various end- uses . INTRODUCTION attapulgite had been used by industry for more than 40 years before it was recognized as a distinct clay mineral. Chemical composition and some of its PROPERTIES were sufficiently similar to montmorillonite to cause this con- fusion. In the 1940's, the structure was worked out by Bradley, and the needle-like particle shape was later demonstrated by electron microscopy (Grim, 1953, pp.)
ATTAPULGITE: PROPERTIES AND USES 285 about 3.7 by 6.0 ~ in cross-section running the length of the needles. Preisinger (1963) has shown how these channels can collapse when attapulgite is
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