Problem 2. (a) Calculate the fraction of atom sites that are vacant for copper (Cu) at its melting temperature of 1084°C (1357 K). Assume an energy for vacancy formation of 0.90 eV/atom. (b) Repeat this calculation at room temperature (298 K).

Copper is a typical face-centered-cubic metal. In its pure state, it has extremely high electrical conductivity. Oxygen in copper causes a major reduction of conductivity. To investigate this issue further, I want to you to tell me whether oxygen atoms substitute for copper atoms, or if they enter interstitial sites.

Write down the Miller-Bravais index of the a-plane of the HCP Zn pure metal and draw the atomic arrangement of the a-plane cross-section with reference to the FCC example below.

Determine the miller indices of HCP for the plane shown below? ja2 (c)