The Chemistry of Clay Minerals by Charles E. Weaver and Lin D. Pollard (Eds.)

By Charles E. Weaver and Lin D. Pollard (Eds.)

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

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Based on the above classification, it is understood that crystallizations, taking place in nature to form minerals, rocks and ore deposits, can be principally treated as solution growth. Magmatic crystallization is a type of high-temperature solutiongrowth with silicates and volatile components acting as solvents. In both regional and contact metamorphism, inasmuch as intergranular volatile components play an important role as solvents, the crystallization should essentially be regarded as solution growth.

Values of metals are usually smaller than 3 and, thus, tend to grow on rough interfaces, whereas crystals with complicated structure usually have a! values larger than 3 and grow on smooth interfaces. The a! values depend on crystallographic orientation. Depending on such orientation, both smooth and rough interfaces may be present in the case of materials with a! values higher than 3. In the generalized formula, the a! values can be different depending on the phase type (melt, solution or vapor) from which crystals grow and type of solvent, or the strength of solute-solvent interaction energy in the case of crystal growth from solution phase.

The final stage - of these processes, but is influenced by the growth history. The textures of crystal aggregates appear due to the nucleation and growth processes of multiple crystals. Inasmuch as these morphological and textural features are the only key features preserved (“message of ancient processes”), it is important to understand the factors that control them. In a solution system, solute component is always armoured (bound) by the solvent component. Both solute and solvent components are transported together in a form of solute-solvent complexes to the growing surface of a crystal, where desolvation takes place.

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