Maximizing Space The Science of Packing Efficiency

The video tutorial explains packing efficiency in crystal lattices, focusing on simple cubic, body-centered cubic, and face-centered cubic unit cells. It covers the structure, coordination number, and packing efficiency of each type, highlighting the differences in atom arrangement and space utilization. The simple cubic unit cell has a low packing efficiency due to its low coordination number, while the body-centered and face-centered cubic unit cells have higher efficiencies due to better atom packing and higher coordination numbers.

What is the packing efficiency of a simple cubic unit cell?

• 48%

• 74%

• 68%

• 52.4%

In a body-centered cubic unit cell, how many atoms are present?

• Four

• Two

• One

• Eight

What is the coordination number of a body-centered cubic unit cell?

• Four

• Six

• Eight

• Twelve

Which unit cell structure has the highest packing efficiency?

• Face-Centered Cubic

• Body-Centered Cubic

• Simple Cubic

• Hexagonal Close-Packed

What is the coordination number of a face-centered cubic unit cell?

• Four

• Six

• Eight

• Twelve