3313Q2Sp02 - 3 ENSC 3313, Spring 2002 Answer any 4...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ENSC 3313, Spring 2002 Quiz 2 Name Answer any 4 Questions only, 1 point each Identify the six 2-fold symmetry axes in a hexagonal crystal. There are 6 side faces and 6 side edges. Join the midpoints of the opposite faces and edges (- the 6 pair up). One exanlple of each is depicted. 2. How many lattice points/atoms per mm are there in the <110> direction of the FCC metal, aluminum, a = 0.04049 nm? This direction is the face diagonal. We have 2 lattice points/atoms in the distance .J2 a, 0.0573 nm. mm = 10-3 m nm = 10-9 m Hence, have 2 x 106 =34.9xlO6 0.0573 Draw the plane {013) and the direction [331 3 in a cubic unit cell. a) For planes, we use reciQrocals, hence the intercepts on the axes are 00, -1, -1/3. With origin at 0, the plane is as sketched. b) For direction, dividing by 3 to keep in 1 cell, we go from top rear left origin, 1, 1, - (1/3) -as shown. Note the direction lies in the plane. Thence, "hv+kv+fw
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

3313Q2Sp02 - 3 ENSC 3313, Spring 2002 Answer any 4...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online