Part 3: Structure of Crystalline Solids

Question 1

Which material types have crystal structures?

Answer 1

Metals, ceramics, some polymers

Question 2

What does “amorphous” mean

Answer 2

Non-crystalline

Question 3

What is the coordination number?

Answer 3

Number of neighbouring/touching atoms to an atom in a structure

Question 4

What is the difference between crystalline and non-crystalline materials?

Answer 4

Crystalline materials have atoms arranged in a periodic 3D pattern

Question 5

When drawing crystallographic directions, always start the vector’s tail at the ____

Answer 5

Origin

Question 6

T/F: A plane can have miller indices determined if it passes through the origin

Answer 6

False, it must be translated

Question 7

When plotting diffraction patterns, a thinner intensity spike indicates ___

Answer 7

bigger crystal size

Question 8

What is the coordination number of a simple cubic structure?

Answer 8

6

Question 9

What is the coordination number of a body-centred cubic structure?

Answer 9

8

Question 10

What is the coordination number of a face-centred cubic structure?

Answer 10

12

Question 11

What is the coordination number of a hexagonal-close packed structure?

Answer 11

12

Question 12

What is the most asymmetrical crystal structure?

Answer 12

Triclinic

Question 13

Which crystal structures have the highest APF?

Answer 13

HCP and FCC