Home > Uncategorized > Introduction to Solid State Chemistry Lecture 16 Notes: Crystallography

Introduction to Solid State Chemistry Lecture 16 Notes: Crystallography

Overview
This teacher drinks Fresca and he’s married. The current lecture costs 46 minutes.

Details
Crystal structure = basis + Bravais lattice

FCC is the densist packing arrangement.

Density = Atomic Volume/Cell Volume

Set up a cartesian coordinate system. Stick the corner of the cube into the origin. 0,0,0. A=011, B=1,0,0.5. Don’t use commas, no fractions so B=[201] To describe negative values, put a bar above the number.

The equation of a plane is (x/a) + (y/b) + (z/c) = 1

hx+ky+lz=1

0.01 to 100Angstroms.
X rays are EM radiation with very short wavelength and very high energyies. Usual wavelengths are from 0.01 A to 100A. 1A = 12400 eV/photon. This can ionize almost anything.

Ionization energies.
H – 14. He 25, 55. Li 5 76 123. Be 9 18 154 218. B 8 25 38 260 341, X 11 24 48 64 393 491.

The discovery of X rays was by Rotgen. It involved 8 Hz, 20V choke coil, vacuum tube. Rotgen created X ray radiography, airport security, and material X rayography. He recieved the first nobel prize in Physics in 1901 and donated the prize money for scholarships in physics; university of Wurtzburg.

Metals have a different electron densities. Different electron densities lead to different pictures.

Cu K alpha radiation has a line at 1.5418 angstroms.

Review
IE13, electron acceptor, non-metal, electrophile.

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