HW_05_Crystal_Structures_1 u2013 . - Question1...

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Question 1 Shown below is a body­centered cubic (BCC) unit cell. What is the coordination number for equal­sized spheres packed in this way ? Answers: Selected Answer: B. 8 A. 6 B. 8 C. 12 D. 2 2 out of 2 points
Question 2 Below is a picture of the BCC unit cell sculpture known as the Atomium, located in Brussels, Belgium. Note this is a reduced­sphere depiction of BCC. If the "height" of the sculpture is 102 meters (assume this is measured from sphere­center to sphere­ center), what is the lattice parameter of this unit cell, in meters (measured atom­center to atom­center) ? 2 out of 2 points
Question 3 Calculate the linear packing factor (LPF) for the <100> type direction of the body­centered cubic (BCC) crystal structure. Answers:
Question 4 A metal is known to have a BCC structure and an atomic radius of 0.16 nm. Determine the lattice parameter of this metal in meters. (answer format X.XXEX) Note this is a calculation­based question. Pay attention to the specified answer format and units here. Hopefully you realize that the answer should be a very

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