The A20 (alpha Uranium) Structure

Last modified 5 April 2001

You can now

• see the structure from several perspectives;
• examine the structure with an external viewer; or
• download the coordinates of the atoms in these pictures in XYZ format.

Thanks to Thomas Adler of DOE for suggesting the addition of this structure.

• Prototype: alpha U
• Pearson Symbol: oC4
• Strukturbericht Designation: A20
• Space Group: Cmcm (Cartesian and lattice coordinate listings available)
• Number: 63
• Other Elements with this Structure:
• Primitive Vectors:
  • A₁ = ½ aX - ½ bY
  • A₂ = ½ aX + ½ bY
  • A₃ = cZ

• Basis Vectors:
  • B₁= - x A₁ + x A₂ + ¼ A₃ = + x b Y + ¼ c Z
  • B₂= + x A₁ - x A₂ - ¼ A₃ = - x b Y - ¼ c Z

See these vectors in a better notation.

Go back to the Other Structure page.

Go back to Crystal Lattice Structure page.

Structures indexed by:

• Strukturbericht Designation
• Pearson Symbol
• Space Group
• Prototype