Modular structures – the paradigmatic case of the heterophyllosilicates
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Giovanni Ferraris
As an example of modular structures, the layered silicates named heterophyllosilicates are reviewed with emphasis on their polysomatic, merotype, plesiotype and topologic aspects. The opportunities offered by a modular analysis of complex inorganic structures are shown via the procedure followed to model the crystal structure of nafertisite and to build various types of series. The heuristic power of the modular crystallography is also proved by successful analyses of oriented intergrowths (and twinning) in members of the bafertisite mero-plesiotype series and the consequent appearance of disorder in the crystal structures of samples affected by syntaxy, e.g. epistolite. Finally, the hypotheses of using, by analogy with phyllosilicates, HOH layers of some heterophyllosilicates to obtain hybrid layered materials are reviewed. In fact, the heterogeneous HOH layers of the heterophyllosilicates can formally be derived by substituting rows of disilicate groups with X-polyhedra (X mainly Ti) in the T sheets of a TOT phyllosilicate layer.
© Oldenbourg Wissenschaftsverlag
Articles in the same Issue
- Preface: Mineralogical Crystallography
- Bonded interactions and the crystal chemistry of minerals: a review
- Understanding the weakly bonded constituents in oxysalt minerals
- High-resolution TEM and XRD simulation of stacking disorder in 2:1 phyllosilicates
- Modular structures – the paradigmatic case of the heterophyllosilicates
- Double wollastonite chains: topological/conformational varieties, polytypic forms, isotypic compounds
- New data on the crystal structures of natural zirconosilicates: structure refinements and ion-exchange behavior
- Minerals with antiperovskite structure: a review
- Minerals and synthetic Pb(II) compounds with oxocentered tetrahedra: review and classification
- Phosphates with amphoteric oxo-complexes: from structural features to genetic conclusions
- A crystallographic review of arsenic sulfides: effects of chemical variations and changes induced by exposure to light
- The P21/m ↔ C2/m phase transition in amphiboles: new data on synthetic Na(NaMg)Mg5Si8O22F2 and the role of differential polyhedral expansion
- Does porous mean soft? On the elastic behaviour and structural evolution of zeolites under pressure
Articles in the same Issue
- Preface: Mineralogical Crystallography
- Bonded interactions and the crystal chemistry of minerals: a review
- Understanding the weakly bonded constituents in oxysalt minerals
- High-resolution TEM and XRD simulation of stacking disorder in 2:1 phyllosilicates
- Modular structures – the paradigmatic case of the heterophyllosilicates
- Double wollastonite chains: topological/conformational varieties, polytypic forms, isotypic compounds
- New data on the crystal structures of natural zirconosilicates: structure refinements and ion-exchange behavior
- Minerals with antiperovskite structure: a review
- Minerals and synthetic Pb(II) compounds with oxocentered tetrahedra: review and classification
- Phosphates with amphoteric oxo-complexes: from structural features to genetic conclusions
- A crystallographic review of arsenic sulfides: effects of chemical variations and changes induced by exposure to light
- The P21/m ↔ C2/m phase transition in amphiboles: new data on synthetic Na(NaMg)Mg5Si8O22F2 and the role of differential polyhedral expansion
- Does porous mean soft? On the elastic behaviour and structural evolution of zeolites under pressure
