Hw2Solution

# Hw2Solution - LOUISIANA STATE UNIVERSITY Mechanical...

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LOUISIANA STATE UNIVERSITY Mechanical Engineering Department Professor Meletis ME 2733 Fall 2004 Materials of Engineering Homework Assignment #2 Solution 1. a) Bravais lattice: face centered cubic (FCC) b) 8 atoms per unit cell (4 Ga and 4 As) c) Lattice Point As Atom Ga Atom 000 000 ¼ ¼ ¼ ½ 0 ½ ½ 0 ½ ¾ ¼ ¾ ½ ½ 0 ½ ½ 0 ¾ ¾ ¼ 0 ½ ½ 0 ½ ½ ¼ ¾ ¾ d) () 3 3 8 23 / 35 . 5 ) 10 654 . 5 ( / 10 6023 . 0 / 92 . 74 / 72 . 69 4 cm gm cm x mol atoms mole gm mole gm atoms = + = ρ ___________________________ 2. We define the origin as shown in the graphs. 0 x z y 0 x y z

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Point A: ½, 0, 0 Point G: ½, ½, 0 Point B: ½, ½, 1 Point H: 0, 0, 1 Direction C: 1 1 0 Direction I: 1 1 ½ 0 0 ½ 0 0 1 1 1 -1/2 1 1 –½ <2 2 1> <2 2 1> Direction D: 0 0 1 Direction J: 0 0 0 ½ ½ 1 0 1 0 -½ -½ 0 0 -1 0 <1 1 0> <0 1 0> Plane E: ½ 1 ½ Plane K: 1 1 1 (2 1 2) (1 1 1) Plane F: ½ 1 Plane L: ½ (2 0 1) 2 0 -2 or (1 0 1) 3. Structure Highest density plane Highest density direction
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## This note was uploaded on 01/22/2012 for the course ME 2733 taught by Professor Meng during the Fall '10 term at LSU.

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Hw2Solution - LOUISIANA STATE UNIVERSITY Mechanical...

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