EMS162_2011_Lecture15

EMS162_2011_Lecture15 - Textured (Non-Random) Powders...

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Yayoi Takamura Textured (Non-Random) Powders Plate-like particulates Preferentially align with flat surfaces parallel to one another Needle-like particulates Preferentially align long-axis in-plane and can rotate around the long axis Yayoi Takamura Powder Sample Holders Pt for high temp Glass slide Stainless steel Cu for low temp, high magnetic field Zero background plate : Si (510) or quartz single crystal but at 6° from (001) planes
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Yayoi Takamura 2/22/2011 EMS 162 - Winter 2011 61 Powder Mixtures 30 40 50 60 70 0 500 1000 1500 25.58 28.28 32.8 35.12 37.76 43.34 47 52.52 55.8 57.5 59.7 61.28 66.48 68.2 70.54 Intensity (a.u.) 2 theta (degrees) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Yayoi Takamura 2/22/2011 EMS 162 - Winter 2011 62 Powder Diffraction File (PDF card) ID Number Chemical formula and name Diffraction method and reference Crystallography data Optical properties Data on specimen Quality mark Diffraction Data
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Yayoi Takamura 2/22/2011 EMS 162 - Winter 2011 63 Phase Identification • Hanawalt Method – Calculate the d values and I/I 1 for all peaks in your diffraction spectra.
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This note was uploaded on 04/04/2011 for the course EMS 162 taught by Professor Howitt during the Spring '08 term at UC Davis.

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EMS162_2011_Lecture15 - Textured (Non-Random) Powders...

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