By B. A. Goodman (auth.), M. J. Wilson FRSE (eds.)

ISBN-10: 9401043132

ISBN-13: 9789401043137

ISBN-10: 9401107270

ISBN-13: 9789401107273

A wisdom of clay is necessary in lots of spheres of medical endeav­ our, relatively in typical sciences akin to geology, mineralogy and soil technology, but additionally in additional utilized parts like environmental and mater­ ials technological know-how. over the past 20 years learn into clay mineralogy has been strongly inspired by means of the improvement and alertness of a num­ ber of spectroscopic options that are now capable of yield information regarding clay fabrics at a degree of element that in the past could have appeared unattainable. this knowledge relates not just to the ideal characterization of the person clay parts themselves, but additionally to the ways that those elements have interaction with an entire variety of absorbate molecules. at this time, notwithstanding, the end result of this learn are to be came across largely in a a little generally dispersed shape within the clinical journals, and it was once therefore thought of to be a suitable time to collect a compilation of those spectroscopic innovations in a manner which might lead them to extra obtainable to the non-specialist. this can be the first objective of this e-book. The authors of some of the chapters first describe the rules and instrumentation of the person spectro­ scopic concepts, assuming at the very least past wisdom, after which pass directly to exhibit how those tools were usefully utilized to clay mineralogy in its broadest context.

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Extra info for Clay Mineralogy: Spectroscopic and Chemical Determinative Methods

Example text

For example there are bands at 1120,992,920,808,730 and 337 cm -I, which suggest a structural integrity and order beyond that implied by simple interstratification. In other interstratified minerals, for example kaolinite-smectite, both components are relatively easy to identify from their IR spectra. In chlorite-vermiculite, however, only one component can be recognized because the chlorite pattern dominates and completely overlies that of the vermiculite, to which it has many similarities. It should perhaps be stressed that IR cannot distinguish between regular and random interstratifications.

20(a)). In contrast, heulandite-clinoptilolite and stilbite belong to group 7 in Breck's classification, where the SBU is a complex unit comprising ten interlinked AI-Si tetrahedra. 20 Infrared spectra of zeolites (group 1): (a) analcime (Barrhead, Scotland), (b) laumontite (Skye, Scotland). Inset curves, KBr discs heated 16 h at 150°C. 21 Infrared spectra of zeolites (group 7): (a) clinoptilolite (Sheuville, Oregon), (b) heulandite (Peyton Collection, Aberdeen University), (c) stilbite (Skye, Scotland).

Proto-imogolite allophane, a closely related non-crystalline aluminosilicate, has the same short-range structure as imogolite, but does not show its fibrous morphology. These minerals typically occur in acid soils and have very characteristic spectra. , 1977). 16(b» has substantially the same pattern as imogolite, but is more diffuse. The band at 348 cm- I is nevertheless still well defined. Allophanes formed at high pH have a framework type of structure, with Al in fourfold and sometimes in both fourfold and sixfold coordination.

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Clay Mineralogy: Spectroscopic and Chemical Determinative Methods by B. A. Goodman (auth.), M. J. Wilson FRSE (eds.)


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