Factors affecting element ratios in the crystallization of minerals

Details Factors affecting element ratios in the crystallization of minerals Factors affecting element ratios in the crystallization of minerals

Dec 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967gecoa..31.2275w&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 31, Issue 12, pp.2275-2286

Physics

2

Scientific paper

The geochemical rules and principles proposed by , and have previously been attacked on theoretical grounds. Some further criticisms are advanced, and reasons are sought as to why the rules often seem to hold, in spite of their weak theoretical foundation. These reasons stem in part from the effects of element abundances, and in part from thermodynamic considerations. The thermodynamic approach to the problem suggested by and by and is modified into a form that is more amenable to consideration from an atomistic and structural point of view. It is pointed out that an atomistic approach to the problem requires as much information on the effects of liquid structure as on those of crystal structure, and the Bernal liquid model is suggested as a useful approximation in some problems involving the crystallization of liquid silicates.

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