(Solved): 7) Consider the bcc unit cell shown: Show the axes and draw the (002) Miller plane on the figure 8) ...

7) Consider the bcc unit cell shown: Show the axes and draw the (002) Miller plane on the figure 8) In natural corundum \( \mathrm{Al}_{2} \mathrm{O}_{3} \) crystals, we normally observe color. The reason a) The pure crystal itself b) Presence of oxygen atoms c) Presence of aluminum ions d) Presence of impurities 9) In preparing larger crystals from a solution, you must do the following: a) Follow fast precipitation b) Follow very slow precipitation c) Use fast cooling d) None of these 10) When you break a solid material, along its planes, the process is called: a) Fracture b) Melting c) Cleavage d) Dissolution