SOLID STATE CHEMISTRY

Teachers: 
MEZZADRI Francesco
Credits: 
6
Site: 
PARMA
Year of erogation: 
2020/2021
Unit Coordinator: 
Disciplinary Sector: 
General and Inorganic Chemistry
Semester: 
Second semester
Language of instruction: 

Italian

Language of instruction: 

english

Learning outcomes of the course unit

The aim of the course is to provide the student with in-depth knowledge of the solid state and its symmetry properties, the general principles of diffraction as a direct consequence of the periodicity of atoms in the crystals, polymorphism, phase transitions and solids reactivity.
Specifically, the student will:
- Know the synthesis techniques of inorganic compounds and materials preparation, the reactivity of solids and the sintering process of ceramics. Know the main types of crystalline packing and the factors influencing them, the structural characterization techniques as well as understand the influence of crystalline symmetry on the properties of materials. Understand the principles of X-ray diffraction and its applications, as well as master the essential data analysis tools. Know the solid solutions and their importance in the materials science field.
- Identify, within the framework of the topics covered by the course, the appropriate approach to seek a specific goal through the use of appropriate synthesis or analysis techniques, demonstrating the ability to effectively apply the acquired knowledge.
- Be able to use the specific language and terminology of the discipline in order to communicate coherently what he/she learned.

The students are supposed to acquire knowledge and competence on the nature of the solid state and on its symmetry properties, on the general principles of the diffraction as consequence of the periodicity of atoms in crystals, on polymorphisms, phase transitions and reactivity of solids. In particular,
1- The student should know the preparation techniques of inorganic compounds and materials, the solid-state reactions and the sintering of ceramics, the principal types of crystal packing, the basic methods of the structural characterization and the structure-properties relationships, the solid solutions and their importance in the field of materials. Moreover, the student should be able to use the specific language of the scientific discipline. (Knowledge and understanding).
2- The student should be able to understand and in some case to predict the properties of complex systems, to plan experiments, to characterize real samples by using appropriate instruments and to elaborate scientific data using advanced computational methods. (Applying knowledge and understanding).
3- The student should be able to organize an experimental activity and to choose the appropriate characterization technique, by critically considering his personal knowledge and capability, and to evaluate the experimental results basing on his personal judgment. (Making judgments).
4- The student should be able to communicate in written and oral form chemical/scientific issues, even in English and utilizing multimedia systems, when interacting with other persons or working in a group. (Communication skills).
5- The student should be able to deal with new scientific or professional topics by learning autonomously, retrieving the necessary information in literature, databases and internet.

Prerequisites

none

Course contents summary

The course deals with the fundamental topics of solid state chemistry, paying particular attention to the structure, properties and reactivity of matter in crystalline form. Wide space is devoted to the origin of the three-dimensional periodicity in crystalline structures, to the definition of symmetry and to its description through space groups. Students are introduced to the theoretical and practical aspects of X-ray diffraction and its applications, also through practical lessons involving real data analysis. The classification of crystal structures is discussed and the factors at their origin are described, as well as the characteristics of the most common crystallographic defects. Theoretical and practical aspects of solid state phase transitions, reactivity of solids and ceramics sintering process are introduced.

The course introduces the student to the characterizing aspects of the Solid State Chemistry. The contents of the lectures range from the origin of the periodicity in the crystal state to the crystallization process and to the origination of amorphous material, from the fundamental rules of symmetry to the space groups, from the scattering phenomenon to the diffraction in crystals, from the classification of the crystal structures to the factors entailing them, from polymorphisms and phase transitions to the chemical reactivity in the solid state, to the sintering of ceramics. Moreover, the course introduces the student to the basic practical aspects of X-ray powder diffraction and to its use in the structural and analytical field.

Course contents

The crystal state. Origin of 3D-periodicity. Crystallization. Nucleation and growth. Amorphous materials and glasses.
Bravais lattice and crystal lattice. Symmetry classification. Point symmetry. Point groups of Bravais lattices: the 7 crystallographic systems. Point group of crystal lattices: the 32 crystallographic classes. Symmetry operation involving translation. Space groups of crystal lattices.
X-rays. Scattering process: Thompson and Compton. Atomic scattering factor. Scattering from ordered systems: the diffraction process. Bragg's law and Laue's equations. Reciprocal lattice. Ewald sphere. Structure factor and equation of the electron density. Reletionships between diffraction and lattice simmetry. The phase problem in crystallography and its possible solution.
Practical aspects of X-ray diffraction. Single crystal and powder diffraction. Crystallographic data bases.
Classification of crystal structures. Close packing and eutactic models. Principal types of binary and ternary structures.
Polymorphysmus and phase transitions. Kinetic and thermodynamic classifications. Continuos phase transitions. Crystallographic trends in phase transitions.
Solid solutions: interstitial and substitutional. Heterovalent substitutions and charge compensation mechanisms.
Reactivity of solid. Solid state reactions. Principles and mechanisms.Experimental aspects. Sintering and ceramic materials.

The crystal state. Origin of 3D-periodicity. Crystallization. Nucleation and growth. Amorphous materials and glasses.
Bravais lattice and crystal lattice. Symmetry classification. Point symmetry. Point groups of Bravais lattices: the 7 crystallographic systems. Point group of crystal lattices: the 32 crystallographic classes. Symmetry operation involving translation. Space groups of crystal lattices.
X-rays. Scattering process: Thompson and Compton. Atomic scattering factor. Scattering from ordered systems: the diffraction process. Bragg's law and Laue's equations. Reciprocal lattice. Ewald sphere. Structure factor and equation of the electron density. Reletionships between diffraction and lattice simmetry. The phase problem in crystallography and its possible solution.
Practical aspects of X-ray diffraction. Single crystal and powder diffraction. Crystallographic data bases.
Classification of crystal structures. Close packing and eutactic models. Principal types of binary and ternary structures.
Polymorphysmus and phase transitions. Kinetic and thermodynamic classifications. Continuos phase transitions. Crystallographic trends in phase transitions.
Solid solutions: interstitial and substitutional. Heterovalent substitutions and charge compensation mechanisms.
Reactivity of solid. Solid state reactions. Principles and mechanisms.Experimental aspects. Sintering and ceramic materials.

Recommended readings

The notes of the lectures and all the supporting material are available to the students and shared on Elly portal. The software used for practical lessons is freeware and freely downloadable from the web for academic use. In addition to the shared material, the student can personally go further on some of the topics discussed during the course using the following books:
A.R. WEST Solid state chemistry and its application, John Wiley and Sons Ltd., Chichester
- C. Giacovazzo et al. Fundamentlas of Crystallography, Oxford Science Publications
- E. Moore and L. Smart Solid State Chemistry: An Introduction, CRC Press

The notes of the lectures and all the supporting material are available to students and shared on Elly platform. In addition to the shared material, the student can personally go further on some of the topics discussed during the course in the following book:
A.R. WEST Solid state chemistry and its application, John Wiley and Sons Ltd., Chichester

Teaching methods

The course counts 6 CFUs (one CFU, University Credits equals one ECTS credit and represents the workload of a student during educational activities aimed at passing the exams), which corresponds to 32 hours of lectures and 24 of practicals. The taught classes will be based mainly on lectures during which besides the projection of slides both educational and scientific freeware software will be employed. All the material will be uploaded on the Elly platform. Practical exercises will be carried out both in the classroom and in the laboratory, aimed at directly involving students in the learning process and demonstrating some practical applications of the topics covered, in particular through the refinement and interpretation of powder and single crystal diffraction data.

The course counts 6 CFUs (one CFU, University Credits equals one ECTS credit and represents the workload of a student during educational activities aimed at passing the exams), which corresponds to 48 hours of lectures. The didactic activity consists of frontal lessons, in which the course topics are proposed from the theoretical point of view and illustrated with examples and exercises. The slides and notes used to support the lessons will be uploaded to the Elly Platform in agreement with the sequence of the arguments of the scheduled lectures. The download of this material is possible only for on-line registered students.

Assessment methods and criteria

Verification of learning and acquired knowledge takes place by an oral exam, in which the student should demonstrate understanding and application ability of the fundamental concepts of the arguments treated in the lectures.

Verification of learning and acquired knowledge takes place by an oral exam, in which the student should demonstrate understanding and application ability of the fundamental concepts of the arguments treated in the lectures.