diffraction instrument wherein the detector screen is positioned exactly 0.25 m away from a crystal sample (analyte) and the electrons from the source have an energy of 12.4 kev. Following an experiment we observe the diffraction pattern shown (below) left. A slice through the center of this pattern (dashed yellow line) yields the interference pattern shown on the right, wherein the first dark spot is located 3.15 cm from the centerline. Using this information calculate the lattice constant (interatomic spacing) of the crystal. 13.15 cm

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter20: Molecular Spectroscopy And Photochemistry
Section: Chapter Questions
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[de Broglie Wavelength; Electron Diffaction] In the lab we have an electron

diffraction instrument wherein the detector screen is positioned exactly 0.25 m away from a
crystal sample (analyte) and the electrons from the source have an energy of 12.4 keV. Following
an experiment we observe the diffraction pattern shown (below) left. A slice through the center
of this pattern (dashed yellow line) yields the interference pattern shown on the right, wherein
the first dark spot is located 3.15 cm from the centerline. Using this information calculate the
lattice constant (interatomic spacing) of the crystal.
3.15 cm
Transcribed Image Text:diffraction instrument wherein the detector screen is positioned exactly 0.25 m away from a crystal sample (analyte) and the electrons from the source have an energy of 12.4 keV. Following an experiment we observe the diffraction pattern shown (below) left. A slice through the center of this pattern (dashed yellow line) yields the interference pattern shown on the right, wherein the first dark spot is located 3.15 cm from the centerline. Using this information calculate the lattice constant (interatomic spacing) of the crystal. 3.15 cm
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