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Describe the powder X-ray diffraction experiment. List the basic components in your diagram and discuss the...

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Chemistry

Describe the powder X-ray diffraction experiment. List the basiccomponents in your diagram and discuss the features/roles of eachcomponent. Include Bragg’s Law as well as coherent and incoherentscattering. What types of information can be obtained using thistechnique? Pros and cons with respect to single crystal XRD?

Answer & Explanation Solved by verified expert
3.7 Ratings (579 Votes)
DiffractionDiffraction is a event that occurs when light contact with anobstacle The waves of light can either bend around the obstacleor in the case of a slit can travel through the slits Theresulting diffraction pattern will show areas of constructiveinterference where two waves interact in phase and destructiveinterference where two waves interact out of phase Calculation ofthe phase difference can be explained by examining by below fig1Inthe figure below two parallel waves BD and AH are striking agradient at an angle o The incident wave BD travels farther thanAH by a distance of CD before reaching the gradient The scatteredwave depicted below the gradient HF travels father than thescattered wave DE by a distance of HG So the total path differencebetween path AHGF and BCDE is CD HG To observe a wave of highintensity one created through constructive interference thedifference CD HG must equal to an integer number of wavelengthsto be observed at the angle psi CDHGnCDHGn where is thewavelength of the light Applying some basic trigonometricproperties the following two equations can be shown    See Answer
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