Worksheet: Crystal Systems

In this worksheet, we will practice identifying unit cells of triclinic, monoclinic, orthorhombic, tetragonal, cubic, trigonal, and hexagonal crystals.

Q1:

The unit cell of calcium fluoride at room temperature contains twelve ions and the lattice angles are all 90. Which of the following terms best describes the lattice structure of calcium fluoride at room temperature?

  • AHexagonal close-packed
  • BBody-centered cubic
  • CFace-centered cubic
  • DSimple cubic
  • EMonoclinic

Q2:

The unit cell of metallic iron at room temperature contains two atoms and the angles between lattice angles are all 90. Which of the following terms best describes the lattice structure of metallic iron at room temperature?

  • ABody-centered cubic
  • BFace-centered cubic
  • CHexagonal close-packed
  • DMonoclinic
  • ESimple cubic

Q3:

Which characteristics does a rhombohedral crystal system have?

  • A 𝑎 = 𝑏 = 𝑐 , 𝛼 = 𝛽 = 𝛾 = 9 0
  • B 𝑎 𝑏 𝑐 , 𝛼 = 𝛽 = 𝛾 = 9 0
  • C 𝑎 = 𝑏 = 𝑐 , 𝛼 = 𝛽 = 𝛾 9 0
  • D 𝑎 𝑏 𝑐 , 𝛼 = 𝛽 = 𝛾 9 0

Q4:

A body-centered cubic crystal system is best represented in the unit cell of which crystalline solid?

  • APerovskite
  • B N a C l
  • CRutile
  • D C s C l

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