Crystal Lattice Structures:	Creation Date: 19 Jan 1996
	Last Modified: 17 Feb 2007

The A6 Face-Centered Tetragonal Lattice

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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• Despite the appearance of the primitive vectors, this is a face-centered tetragonal (fct) structure, a distortion of the fcc structure and the monatomic analog of the L1₀ structure. In addition, this structure has exactly the same symmetry as the A_a structure. In the A6 structure, c/a is near the fcc ratio of Sqrt[2], while in the A_a structure, c/a is near the bcc ratio of 1.
• 17 Feb 2007: Gave the basis vector an atom type.

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• Prototype: In
• Pearson Symbol: tI2
• Strukturbericht Designation: A6
• Space Group: I4/mmm (Cartesian and lattice coordinate listings available)
• Number: 139
• Other Elements with this Structure: Pa (See above)
• Reference: Pearson (Alloys), p. 310.
• Primitive Vectors:

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

• Basis Vectors:

  B1 = 0   (In) (2a)

See these vectors in LaTeX output format.

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Structures indexed by: Strukturbericht Symbol Pearson Symbol Space Group Prototype

This is a mirror of an old page created at the Naval Research Laboratory Center for Computational Materials Science The maintained successor is hosted at http://www.aflowlib.org/CrystalDatabase/ and published as M. Mehl et al., Comput. Mater. Sci. 136 (Supp.), S1-S828 (2017).