Crystal Lattice Structures:	Reference Date:  1 Jan 1998
	Last Modified: 15 Apr 2008

Al₃Ti (D0₂₂) Structure

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.
• visualize the structure (Uses the JMOL Applet)

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• A lattice with tetragonal symmetry. The atoms are on the sites of an face centered cubic lattice when c = 2 a.
• The previous version of this page had an error in the real-space positions of the (4d) atoms (½ c instead of ¼ c). In addition, we've changed the graphics to reflect the real lattice constants of Al₃Ti.
• When c/a = 1/√2, this becomes the cubic D0₃ structure.

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• Prototype: Al₃Ti
• Pearson Symbol: tI8
• Strukturbericht Designation: D0₂₂
• Space Group: I4/mmm (Cartesian and lattice coordinate listings available)
• Number: 139
• Reference: Pearson (Alloys), p. 328.
• Other compounds with this structure: Al₂CuU, Al₃Dy, Al₃V, Ga₃Hf, GaMn₃, InZr₃, NbNi₃, Ni₃V, Pd₃Ta, Pd₃Ti, Pd₃V, Pt₃V
• Primitive Vectors:

  A1	=	a X
  A2	=	a Y
  A3	=	½ a X + ½ a Y + ½ c Z

• Basis Vectors:

  B1	=		0		(Ti)	(2a)
  B2	=	+ ½ A1 + ½ A2	=	½ a X + ½ a Y	(Al)	(2b)
  B3	=	+ ¼ A1 - ¼ A2 + ½ A3	=	½ a X + ¼ c Z	(Al)	(4d)
  B4	=	- ¼ A1 + ¼ A2 + ½ A3	=	½ a Y + ¼ c Z	(Al)	(4d)

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Structures indexed by: Strukturbericht Symbol Pearson Symbol Space Group Prototype

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