View of an instrument Crystal Monochromator Detector X-Ray Tube 6
6 View of an instrument
The Bragg-Brentano Geometry Mono- chromator Divergence slit Antiscatter- slit Detector- Tube slit Sample 7
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Crystal Monochromator X-ray beam monochromatization can be achieved by diffraction from single crystals:Si,Ge,Licl,and graphite. 2dsin= Monochromator Slit Polychromatic Divergence Beam slit Monochromatic Beam Longer wavelengths Shorter Wavelengths 62 61 01 Monochromator Sufficient to separate Ka and KB Not sufficient to separate Ko and Ko
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Powder Pattern Cell Structure Sample Instrument Unit Cell 28 + 山 Atomic Structure 20 + Sample Instrument →20 A人MW Powder Pattern 26 9
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La(NiasSn 1s),Cu Ko 25 20 Diffractometers 1.5 15 10 113.Ka ￥032,Ka1 131,Ka 113.Ka 0.5 032.Ka2 /131,Ka Powder Diffractometer 0 0.0 80 81 83 83 84 0 20 30 40 50 708090100110120 Bragg angle,20(deg.) V.K.Pecharsky and P.Y.Zavalii Fundamentals of Powder Diffraction and Structural Characterization of Materials
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