New data on the crystal structures of natural zirconosilicates: structure refinements and ion-exchange behavior
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A review of the mineralogical, structural and crystal-chemical studies carried out on a large group of natural zirconosilicates is reported. These zirconosilicates belong to a large number of distinct structural types, and those with mixed frameworks of isolated Zr-centred octahedra and silicate complexes are described according to the degree of condensation of SiO4 tetrahedra.The microporous heteropolyhedral nature of these phases is considered in connection with their ion exchange properties. The application of X-ray diffractometers equipped with CCD detectors, use of the Rietveld method, and electron microprobe and IR spectroscopic data provide new insights into the structural peculiarities of these minerals. The results stimulate the search for new Zr—Si-compounds with potential applications in the areas of catalysis, separation of molecules, ion exchange, etc.
© Oldenbourg Wissenschaftsverlag
Artikel in diesem Heft
- 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
Artikel in diesem Heft
- 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
