Sodium transforms from BCC to HCP at about T = 23 K. Assuming the density remains fixed and the c/a ratio is ideal, a) calculate the HCP lattice spacing a given that the cubic lattice spacing a' = 4.23 Å in the cubic phase. Cobalt has two forms: a-Co, with HCP structure (lattice spacing of a = 2.51 Å) and B-Co, with FCC structure (lattice b) spacing of acubic = 3.55 Å). Assume that the HCP structure has an ideal c/a ratio. Calculate and compare the position of the first five X-ray power diffraction peaks.
Sodium transforms from BCC to HCP at about T = 23 K. Assuming the density remains fixed and the c/a ratio is ideal, a) calculate the HCP lattice spacing a given that the cubic lattice spacing a' = 4.23 Å in the cubic phase. Cobalt has two forms: a-Co, with HCP structure (lattice spacing of a = 2.51 Å) and B-Co, with FCC structure (lattice b) spacing of acubic = 3.55 Å). Assume that the HCP structure has an ideal c/a ratio. Calculate and compare the position of the first five X-ray power diffraction peaks.
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Transcribed Image Text:Sodium transforms from BCC to HCP at about T = 23 K. Assuming the density remains fixed and the c/a ratio is ideal,
a)
calculate the HCP lattice spacing a given that the cubic lattice spacing a' = 4.23 Å in the cubic phase.
Cobalt has two forms: a-Co, with HCP structure (lattice spacing of a = 2.51 Å) and B-Co, with FCC structure (lattice
b)
spacing of acubic = 3.55 Å). Assume that the HCP structure has an ideal c/a ratio. Calculate and compare the position of the
first five X-ray power diffraction peaks.
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