Chapter 3: Problem 1
What is the difference between atomic structure and crystal structure?
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Chapter 3: Problem 1
What is the difference between atomic structure and crystal structure?
These are the key concepts you need to understand to accurately answer the question.
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Niobium has an atomic radius of 0.1430 nm and a density of \(8.57 \mathrm{g} / \mathrm{cm}^{3} .\) Determine whether it has an FCC or BCC crystal structure.
Beryllium has an HCP unit cell for which the ratio of the lattice parameters \(c / a\) is 1.568 . If the radius of the Be atom is \(0.1143 \mathrm{nm}\), (a) determine the unit cell volume, and (b) calculate the theoretical density of Be and compare it with the literature value.
Sketch the \((01 \overline{1} 1)\) and (2110) planes in a hexagonal unit cell.
(a) Derive the planar density expression for the HCP (0001) plane in terms of the atomic radius \(R.\) (b) Compute the planar density value for this same plane for titanium.
The unit cell for uranium has orthorhombic symmetry, with \(a, b,\) and \(c\) lattice parameters of \(0.286,0.587,\) and \(0.495 \mathrm{nm},\) respectively. If its density, atomic weight, and atomic radius are \(19.05 \mathrm{g} / \mathrm{cm}^{3}, 238.03 \mathrm{g} / \mathrm{mol},\) and \(0.1385 \mathrm{nm}\) respectively, compute the atomic packing factor.
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