What Are The Drone Anti-jamming Systems Technology?
Lecture 02
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2. CERAMIC BONDING • Bonding: --Mostly ionic, some covalent. --% ionic character increases with difference in electronegativity. Adapted from Fig. 2.7, Callister 6e. (Fig. 2.7 is adapted from Linus Pauling, The Nature of the Chemical Bond , 3rd edition, Copyright 1939 and 1940, 3rd edition. Copyright 1960 by Cornell University. • Large vs small ionic bond character:
3. Rules for Ionic Structures • Rule 1: Charge Neutrality : --Net charge in the structure should be zero. --General form:
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6. COORDINATION # AND IONIC RADII • Coordination # increases with: Issue: How many anions can you arrange around a cation? Adapted from Table 12.2, Callister 6e. There are many possibilities—how do we generally determine which is appropriate? And what do we call them? Binary Trigonal Tetrahedral Octahedral Cubic
18. A m X p STRUCTURES • Consider CaF 2 : • Based on this ratio, coord # = 8 and structure = CsCl. • BUT: there are half as many Ca 2+ as F - ions—how can we accommodate this? CsCl structure w/only half of cation sites occupied. Adapted from Fig. 12.5, Callister 6e. m is not equal to p