Lect25_notes

Factor the absorption factor 2 t 1 sin af

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: p; Microanalysis: Lecture 25 ! 19 Absorption Factor! The total measured intensity:! ! ! absorption ! factor multiplicity ! 2 phkl L p θ A θ e−2 M I hkl = Fhkl ! temperature ! structure ( Lorentz ) factor factor polarization ! factor ! ! ! ! The Absorption Factor:! ! ! 2 µt − ⎞ 1 ⎛ ! sin θ AF = 1− e ⎟ ! 2µ ⎜ ⎝ ⎠ ! ( ) ( ) CBEMS 164 – XRD, SEM & Microanalysis: Lecture 25 ! 20 Temperature Factor! The total measured intensity:! ! ! absorption ! factor multiplicity ! 2 p L p θ A θ e−2 M I hkl = Fhkl ! hkl temperature ! structure ( Lorentz ) factor factor polarization ! factor ! ! ! ! The Temperature Factor: Accounts for atomic vibration as a function of temperature! ! ! f = fO = e− M T ! ! 2 ⎛ sin θ ⎞ ! ( ) ( ) M T = BT ⎜ ⎝ λ ⎟ ⎠ CBEMS 164 – XRD, SEM & Microanalysis: Lecture 25 ! 21 Structure Factor Examples – Calculations in Class! ! ! Simple Cubic! ! ! ! Body centered Cubic! ! ! ! Face-Centered Cubic! ! ! ! Diamond! ! ! NaCl! ! ! ! ! ! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 25 ! 22...
View Full Document

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.

Ask a homework question - tutors are online