PRINT NAME ___________________________________ INTRODUCTION TO MATERIAL SCIENCE MSE-150 BONUS QUIZ 1 I PLEDGE MY HONOR THAT I HAVE NEITHER GIVEN OR RECEIVED AID ON THIS EXAMINATION. SIGNATURE ____________________________________ The diamond cubic crystal structure can be described as an FCC arrangement of atoms with additional atoms in 4 of the 8 tetrahedral interstitial sites. (1 point) How many carbon atoms are associated with a unit cell for the diamond cubic structure? a) 2 b) 4 c) 6 d) 8 (1 point) What is the coordination number for diamond cubic? a) 2 b) 4 c) 6 d) 8 (1 point) Describe the chemical bonding in diamond cubic. a) ionic b) covalent c) ionic/covalent d) covalent/ionic (1 point) Which of these elements form the diamond cubic structure? a) Tin b) Arsenic c) Silicon d) Zinc (3 points) If carbon has an atomic radius of 0.0770 nm, calculate the lattice constant for diamond. a) 0.368 nm b) 0.468 nm c) 0.356 nm d) 0.668 nm The III-V compound semiconductor, GaAs, has the crystal structure of
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