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# Answers%20to%20HW2%20problems - [1 0 2 3.31 A 1 1 0 B[1 2 1...

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3.4 Hint: Consider the tetrahedron labeled as JKLM shown in a sketch of one-third of an HCP unit cell below 3.7 10.21 g/cm3 3.8 0.138 nm 3.13 In order to determine whether Nb has an FCC or a BCC crystal structure, we need to compute its density for each of the crystal structures. Nb has a BCC crystal structure. 3.17 (a) 4.87 × 10 23 cm3/unit cell (b) 1.84 g/cm3 3.29 [2 1 2 ] and
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Unformatted text preview: [1 0 2] 3.31 A [ 1 1 0]; B [1 2 1]; C [0 1 2 ]; D [1 2 1] 3.35 A [ 1 1 2 3]; B [ 2 1 1 0]; C [1 0 1 0]; 3.39 no solution 3.42 A (2 1 1 ) B (0 2 1 ) 3.40 (a) tetragonal (b) body-centered tetragonal 3.42 (a) (0 1 1 0) (b) ( 1 1 2 2) 3.53 PD 100 =1/4R 2 = 1.223×1019m − 2 PD 111 =1/2R 2 3= 1.412×10 19 m − 2 3.55 PD 0001 =1/2R 2 3= 1.373×10 19 m − 2...
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