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3.29 The unit cell for Al₂O3 has hexagonal symme- try with lattice parameters a = 0.4759 nm and c = 1.2989 nm. If the density of this material is 3.99 g/cm³, calculate its atomic packing factor. For this computation, use ionic radii listed in Table 3.4. Cation AP. Ba²+ Fot Fo K+ Mg Ma² Na' N₁² Si Ti Jonic Radius (am) 0.053 0.136 0.100 0.170 0.077 0.069 0.138 0.072 0.067 0.102 0.069 0.040 0.061 Anion Br a I™ 0² Jonic Radius (am) 0.196 0.181 0.133 0.220 0.140 0.184

3.29 The unit cell for Al₂O3 has hexagonal symme- try with lattice parameters a = 0.4759 nm and c = 1.2989 nm. If the density of this material is 3.99 g/cm³, calculate its atomic packing factor. For this computation, use ionic radii listed in Table 3.4. Cation AP. Ba²+ Fot Fo K+ Mg Ma² Na' N₁² Si Ti Jonic Radius (am) 0.053 0.136 0.100 0.170 0.077 0.069 0.138 0.072 0.067 0.102 0.069 0.040 0.061 Anion Br a I™ 0² Jonic Radius (am) 0.196 0.181 0.133 0.220 0.140 0.184

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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the answer should be equal to 0.842
3.29 The unit cell for Al₂O3 has hexagonal symme- try with lattice parameters a = 0.4759 nm and c = 1.2989 nm. If the density of this material is 3.99 g/cm³, calculate its atomic packing factor. For this computation, use ionic radii listed in Table 3.4. C= Cation AP. Ba²+ at Fo² Fo³ K+ Mg²+ Ma² Na' Ni² Si Ti Jonic Radius (nm) 0.0153 0.136 0.100 0.170 0.077 0.069 0.138 0.072 0.067 0.102 0.069 0.040 0.061 Anion Br a™ I- 0² S²- Jonic Radius (am) 0.196 0.181 0.133 0.220 0.140 0.184
Transcribed Image Text:3.29 The unit cell for Al₂O3 has hexagonal symme- try with lattice parameters a = 0.4759 nm and c = 1.2989 nm. If the density of this material is 3.99 g/cm³, calculate its atomic packing factor. For this computation, use ionic radii listed in Table 3.4. C= Cation AP. Ba²+ at Fo² Fo³ K+ Mg²+ Ma² Na' Ni² Si Ti Jonic Radius (nm) 0.0153 0.136 0.100 0.170 0.077 0.069 0.138 0.072 0.067 0.102 0.069 0.040 0.061 Anion Br a™ I- 0² S²- Jonic Radius (am) 0.196 0.181 0.133 0.220 0.140 0.184
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