Mineral absorbtion

The discrepancy in numbers between natural and synthetic varieties is an expression of the usefulness of zeolitic materials in industry, a reflection of their unique physicochemical properties. The crystal chemistry of these aluminosilicates provides selective absorbtion and exchange of a remarkably wide range of molecules. Some zeolites have been called molecular sieves. This property is exploited in the purification and separation of various chemicals, such as in obtaining gasoline from crude petroleum, pollution control, or radioactive waste disposal (Mumpton, 1978). The synthesis of zeolites with a particular crystal structure, and thus specific absorbtion characteristics, has become very competitive (Fox, 1985). Small, often barely detectable, changes in composition and structure are now covered by patents. A brief review of the crystal chemistry of this mineral group illustrates their potential and introduces those that occur as fibers. 

Carbohydrates which are digestible appear to have no dramatic effect on metabolism of xenobiotics however, the nondigestible carbohydrates can mediate the toxicity of a xenobiotic. Dietary fiber can reduce nutrient availability by absorbtion of certain minerals and/or vitamins. Inclusion in the diet of fiber has been associated with a lower incidence of colon cancer, and this... 

Gratz R, Heinrich W (1997) Morrazite-xenotime thermobarometry experimental cahbration of the miscibihty gap in the system CeP04-YP04. Am Mineral 82 772-780 Harlov DE, Forster HJ, Nijland TG (2002) Fluid-induced nucleation of (Y+REE)-phosphate minerals within apatite nature and experiment. Am Mineral 87 245-261 Heinrich KFJ (1985) A simple, accrrrate absorbtion model.Microbeam Analysis-1985 20 79-81 Heinrich W, Andrehs G, Franz G (1997) Monazite-xenotime miscibility gap thermometry. I. An empirical calibration. J Metamor Geol 15 3-16... 

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