Close Packed Systems, HCP Questions, and Anisotropy

What is the close packed direction of a simple cubic structure?

• It doesn't have a close packed direction

• <110>

• <100>

• <111>

What is the close packed direction of a body centered cubic system?

• It doesn't have a close packed direction

• <110>

• <100>

• <111>

What is the close packed direction of a face centered cubic structure?

• It doesn't have a close packed direction

• <110>

• <100>

• <111>

What is the close packed plane of a simple cubic structure?

• It doesn't have a close packed plane

• {111}

• {100}

• {110}

What is the close packed plane of a body centered cubic structure?

• It doesn't have a close packed plane

• {111}

• {100}

• {110}

What is the close packed plane of a face centered cubic structure?

• It doesn't have a close packed plane

• {111}

• {100}

• {110}

Interplanar distance of a family of planes with miller indices (hkl) in simple cubic lattice is

Why is there a different Miller Index system for hexagonal systems?

• Hexagonal systems have an extra axis of symmetry so having a four-index system more easily captures this symmetry.

• The Miller Index system is the same for all crystal systems.
• Hexagonal systems do not require a unique indexing system.

True or False: Crystals can be anisotropic

• True

• False

True or false: Aluminum is isotropic

• True

• False