CELL445 Chapter Notes -Sodium Chloride, Problem Set, Ionic Radius
6 Mar 2014
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All those triangles in the last two lectures . Density = mass volume range 1 50 g cm 3 bcc fcc r = 12. 6, 12. 7 till and including p. 461 (p. 483 5th ed. ) (electronic materials, liquid crystals, ceramic materials) Ba crystallizes in a bcc structure and has a density of. Bcc means there are 2 atoms in the unit cell atom. 8 corner 8 corners + 1 center atom = 2 ba atoms. 6. 022 x 1023 atoms ba 2 atoms per cell. From the last lecture fe problem (fe is a bcc crystal) r = 4 5. 013 x 10 8 cm = 2. 17 x 10 8 cm. = 2. 17 x 10 10 m = 217 pm. Atomic radii are in the range of 50 to several hundred picometers. The crystal structure of mgo is similar to that of. The ionic radius of mg2+ is 72pm and that of.
