Download Diagenesis, IV by G. V. Chilingarian PDF

By G. V. Chilingarian

The current quantity keeps the philosophy of collecting contributions on diagenesis on behalf of these requiring such periodic literary surveys, particularly, teachers and practitioners (teachers, researchers, and oil and ore explorationists).

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Extra resources for Diagenesis, IV

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Crystal growth is like breathing or pulsation. This is another reason for the appearance of growth banding. Inasmuch as morphology of crystals I . SUNAGAWA b C A Fig. 2-12. Expected various internal morphologies (heterogeneities) in single crystals. (a) Top row indicates various morphologies expected when the driving force diminishes monotonously; (b) middlc row shows the case when growth parameters change abruptly during growth; and (c) the bottom row indicates a variety of growth sector boundaries, depending on the relative growth rates of thc two faces.

Mass transportation of solute components from the bulk solution to the growing surface by diffusion is in general slower than that necessary to compensate concurrently the depletion in the diffusion boundary layer due to growth. Crystal growth is like breathing or pulsation. This is another reason for the appearance of growth banding. Inasmuch as morphology of crystals I . SUNAGAWA b C A Fig. 2-12. Expected various internal morphologies (heterogeneities) in single crystals. (a) Top row indicates various morphologies expected when the driving force diminishes monotonously; (b) middlc row shows the case when growth parameters change abruptly during growth; and (c) the bottom row indicates a variety of growth sector boundaries, depending on the relative growth rates of thc two faces.

I 0 2 00 3 5 Fig. 2-1. Schematic illustration of the process of growth of crystals from solution phase, and the problems involved at each step. (0) Solubility curve; C = concentration, T = temperature. Supersaturated state is attained by changing temperature ( a ) , or by evaporation (b), or by diffusion (c). (1) Supersaturated solution. There is a fluctuation in concentration, which leads to the appearance of embryonic particles. (2) Appearance of embryonic particles (E) and critical nucleus (N).

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