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 9 0 . Which of the following terms best describes the lattice structure of calcium fluoride at room temperature?

  • ASimple cubic
  • BBody-centred cubic
  • CHexagonal close-packed
  • DFace-centred cubic
  • EMonoclinic

Q2:

The unit cell of metallic iron at room temperature contains two atoms and the angles between lattice angles are all 9 0 . Which of the following terms best describes the lattice structure of metallic iron at room temperature?

  • ASimple cubic
  • BFace-centred cubic
  • CHexagonal close-packed
  • DBody-centred cubic
  • EMonoclinic

Q3:

A rhombohedral crystal system has which characteristics?

  • 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?

  • A N a C l
  • BPerovskite
  • CRutile
  • D C s C l

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