Determine the d-spacing using bragg equation

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Reference no: EM132097

Gold has a face centered cubic crystal structure, where there are four atoms per unit cell.

981_Determine the d-spacing.png

Below is a calculated XRD powder pattern for bulk gold. The y-axis caption (not listed) is diffraction intensity in arbitrary units.

666_Determine the d-spacing1.png

Using the Bragg equation, and the fact that Cu Ka radiation was used (λ = 1.541 Å) to calculate this pattern, determine the d-spacing (Å), to 3 decimal places, for the (111) reflection (2θ = 38.184o) and the (222) reflection (at 2θ = 81.732o). These two reflections are related. Which d-spacing is larger and why?

Reference no: EM132097

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