Crystal Chemistry and Properties of Materials with Quasi-One-Dimensional Structures

There is no doubt that in the development of the Physics and Chemistry of Solids during the last fifteen years, the very important place taken by low-dimensional compounds will be remembered as a major event. Dealing very widely at the beginning with two-dimensional structures and intercalation chemistry, this theme progressively evolved as the synthesis of one-dimensional conductors increased, along with the observation of their remarkable properties. Beyond the classical separation of the traditional disciplines, essential progress has stemmed each time from the concerted efforts of, and overlapping between, chemists, experimental physicists, and theoreticians. This book is a synthetic approach which aims to retrace these united efforts. The observation and characterization of charge density waves in their static or dynamic aspects have been the main points to attract the interest of researchers. Two broad categories of compounds have been the material basis of these observa tions: transition-metal polychalcogenides and either condensed-cluster phases or bronze-type compounds. These families are referred to throughout the various chapters of this book, thus illustrating the continuous progress of concepts in this domain and, at the same time, providing the first synthetic and exhaustive view of this group of materials.

Inhalt
An Approach to One-Dimensional Compounds.- 1. Structural considerations.- 2. 1D Structures for intercalation chemistry.- 3. 1D Materials as conductors.- 4. Conclusion.- Orbital Interaction Analysis for the Electronic Structures of Low-Dimensional Solids.- 1. Introduction.- 2. Crystal structure and band orbital.- 3. Peierls distortion.- 4. Low-dimensional solids.- 5. Concluding remarks.- Structural Studies of Phase Transitions in One-Dimensional Conductors.- 1. General aspects of phase transitions in condensed matter.- 2. Peierls instability of a one-dimensional metal.- 3. Representative structural studies of one-dimensional conductors.- 4. Concluding remarks.- Charge Density Wave Instability and Nonlinear Transport in the Quasi-One-Dimensional Blue Bronzes K0.30MoO3 and Rb0.30MoO3.- 1. Introduction.- 2. Structural aspects.- 3. Ohmic transport.- 4. Optical properties.- 5. Specific heat and lattice dynamics.- 6. Magnetic properties.- 7. Band structure and the Peierls transition.- 8. Nonlinear transport and related properties.- 9. Conclusion.- New Transition Metal Halides and Oxides with Extended MetalMetal Bonding.- 1. Introduction.- 2. Background.- 3. Infinite metal chains.- 4. Related sheet structures.- 5. General correlations.- 6. Outlook.- Pseudo-One-Dimensional MX3 and MX4 Transition Metal Chalcogenides.- 1. Trichalcogenides of iva, va, and via elements.- 2. FeNb3Se10: a new structural type.- 3. Tetrachalcogenides and related compounds.- 4. Nb2Se9 and pentachalcogenides.- 5. Discussion and concluding remarks.- Pentachalcogenides of Transition Metals.- 1. Introduction.- 2. Preparation.- 3. Crystal structure.- 4. Transport properties and related phenomena.- 5. Band structure and Fermi surface.- 6. Magnetic susceptibility.- 7. Raman scattering.- 8. Elastic anomalyand specific heat.- 9. Pressure effect.- 10. Mixed systems.- From Three-Dimensional to One-Dimensional Cluster Mo6 Chalcogenides.- 1. Introduction.- 2. Principle of the cluster condensation in ternary Mo-chalcogenides.- 3. Metalmetal bonding approach in the Mo-cluster compounds.- 4. New Ternary Mo-Chalcogenides with discrete Mo6n clusters (n finite).- 5. Electronic properties and bond order.- 6. New pseudo-one-dimensional $$({\rm Mo}{6/2}{\rm X}{6/2})_{\infty}^{1}$$ infinite chain.- 7. Conclusion.- Index of Formulas.- Index of Names.- Index of Subjects.