The Science and Engineering of Materials (MindTap Course List)
7th Edition
ISBN: 9781305076761
Author: Donald R. Askeland, Wendelin J. Wright
Publisher: Cengage Learning
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Chapter 3, Problem 3.29P
Thoria or thonrium dioxide can be describedas an FCC lattice with a basis of Th (0, 0, 0) and O (1/4, 1/4, 1/4) and O (1/4, 1/4,3/4). Thorium and thorium dioxide areradioactive materials. Thorium dioxideis commonly used in tungsten electrodesfor arc welding. Thoria improves the hightemperature properties of the electrodesand promotes emission of electrons from the electrode tip.
- How many atoms of each type arethere in the conventional unit cell ofthorium dioxide?
- Is this Consistent with the chemicalformula of thorium dioxide? Explain.
- What is the coordination number(number of nearest neighbors) for eachTh atom?
- What is the coordination number(number of nearest neighbors) foreach O atom?
- What type of interstitial site do theoxygen atoms occupy?
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Chapter 3 Solutions
The Science and Engineering of Materials (MindTap Course List)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - What is a polycrystalline material?Ch. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
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