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Lattices of many simple ionic solids are built by taking a SC or FCC lattice of ions of one type and placing ions of opposite charge in the holes in the lattice. EXAMPLE: CsCl has a SC lattice of Cs+ ions with Cl- in the center. 20. Simple Ionic Compounds. CsCl unit cell has a SC lattice of Cl- ions with Cs+ in the center.
Types of Solids. • There are 4 types of solids: 1. Ionic Crystals. 2. Metallic Crystals. 3. Molecular Crystals. 4. Covalent Network Crystals. Page 3. Ionic Crystals. • Ionic Crystals are solids in which positive and negative ions arrange in a crystal lattice structure, with alternating packing of the positive and negative ions
TABLE. 12.7. Characteristics of Crystalline Solids. Structural. Intermolecular. Type. Particles. Forces. Typical Properties. Examples. Metallic. Cations and. Metallic bonds. Hardness varies from soft to very. Na, Mg, Al, Fe, delocalized hard; melting point varies from. Sn, Cu, Ag, W electrons low to very high; lustrous; ductile;.
20 Oct 2006 Special aspects of solid state chemistry. Close relationship to solid state physics and materials science. Importance of structural chemistry. • Knowledge of several structure types. • Understanding of structures. Physical methods for the characterization of solids. • X-ray structure analysis, electron microscopy
?Predict the structures of ionic solids from their ionic radii and empirical formula. ?Be able to use the periodic table to qualitatively compare the band gap energies of semiconductors. ?Understand how n-type and p-type doping can be used to control the conductivity of semiconductors. ?Understand how polymers are
There are four types of solids: (1) molecular solids [formed from molecules] (2) covalent network solids [formed from atoms] (3) ionic solids [formed form ions] and (4) metallic solids. [formed from metal atoms]. Their physical properties relate closely to the intermolecular and intramolecular forces between the particles.
19 Oct 2015 Types of Solids. Amorphous Solids are solids that lack a regular three-dimensional arrangement of atoms. They lack long-range structural order. Crystalline solids have atoms/ions/molecules arranged in regular, repeating patterns. They possess long-range periodicity. • minimizes free energy of the
positioned. To fully understand the properties of solid materials, one must have a thorough knowledge of the structural interactions between the subunit atoms, ions, and molecules. This chapter will outline the various types of solids, including structural classifications and nomenclature for both crystalline and amorphous.
Figure 2. Elementary cell of rhombohedral structure. Figure 3. Projection on the hexagonal plane. The three types of cavity are represented. Large cations M are located in site 1.
W.K. Chen. Electrophysics, NCTU. 1. Chapter 1 The Crystal. Structure of Solids. W.K. Chen. Electrophysics, NCTU. 2. Outline. ? Semiconductor material. ? Type of solids. ? Space lattices. ? Atomic bonding. ? Imperfections & impurities in solids. ? Growth of semiconductor materials
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