Calculate the theoretical volume change accompanying a polymorphic transformation in apure metal from the FCC to BCC crystal structure.X-rays of an unknown wavelength are diffracted 43.4° by copper. Separate determinationsindicate that this diffraction line for copper is the first-order line for d₁11. What is the wave-length of the x-rays? The same wavelength is used to analyze tungsten. What is the angle,20, for the second-order diffraction lines of the do10 spacings?

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Calculate the theoretical volume change accompanying a polymorphic transformation in a pure metal from the FCC to BCC crystal structure.

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

Chapter22: Inorganic Materials

Section: Chapter Questions

Problem 7P

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Concept explainers

Crystallography

Crystallography is the category of science that focuses on the atomic and molecular arrangements with their bonding constituting the crystal structure. It is derived experimentally and originated in the year 1912. It is a combination of two words; those are crystal, meaning a cold drop, and graph, meaning writing.

Question

Calculate the theoretical volume change accompanying a polymorphic transformation in a
pure metal from the FCC to BCC crystal structure.
X-rays of an unknown wavelength are diffracted 43.4° by copper. Separate determinations
indicate that this diffraction line for copper is the first-order line for d₁11. What is the wave-
length of the x-rays? The same wavelength is used to analyze tungsten. What is the angle,
20, for the second-order diffraction lines of the do10 spacings?

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