This chapter offers a not-exhaustive overview of structural mesoporosity in selected, natural mineral phases (carbon forms, chrysotile, gas hydrates). After a short introduction devoted to the introduction of the most general features of porosity, attention will be paid mostly to natural mesoporous mineral phases, leaving microporosity to other chapters of this volume. However, a few peculiar microporous structures will be also considered, because of their close resemblance with the mesoporous substances.
Conversely, no attempt will be made to report properties and structures of the many examples of man-made mesoporous materials including silica xerogels, mesoporous synthetic silica, calcium phosphate and the...
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