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Cbems 164 xrd sem microanalysis lecture 16 6 fcc

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Unformatted text preview: XRD, SEM & Microanalysis: Lecture 16 ! 5 Representation of a Series of Parallel Planes! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 16 ! 6 FCC Crystals oriented to Look Parallel to Various Planes! (100) (111) (110) (510) CBEMS 164 – XRD, SEM & Microanalysis: Lecture 16 ! 7 CBEMS 164 – XRD, SEM & Microanalysis: Lecture 16 ! 8 Lattices - 14 Bravais Structures! Lattice Geometry and the Unit Cell! In thinking about the structure of crystals, we start by ignoring the atoms themselves.! ! We focus instead on a set of imaginary points that have a fixed arrangement in space. ! ! (Lattice points)! ! This set of points have a fixed arrangement in space with regards to the atoms that make up the crystal, and can be thought of as a skeleton or framework that the crystal is built upon.! ! ! Lets start with an example in two dimensions: Graphite! ! ! ! 9 CBEMS 164 – XRD, SEM & Microanalysis: Lecture 16 ! Two Dimensional Crystals! Graphite - The atoms are bonded together in sheets...
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This note was uploaded on 01/16/2014 for the course CBEMS 164 taught by Professor Porter,j during the Fall '08 term at UC Irvine.

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