Crystal Lattice Structures: Creation Date: 31 Jul 1997 Last Modified:  9 Jan 2009

# The γCuTi (B11) Structure

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• A lattice with tetragonal symmetry. When c = 2 a, x1 = 1/8, and x2 = 5/8, the atoms are on the sites of a body-centered cubic lattice. If, on the other hand, c = 2 sqrt(2) a, with the same xi, the atoms are on the site of a face-centered cubic lattice. This is the phase that Lu et al. refer to as ``Z2''.
• 9 Jan 2009: The positions of the (2c) sites are non-standard. Properly the Wyckoff (2c) positions are at +/- (1/4,1/4,x), not +/- (1/4,-1/4,x). The space group and position files are correct for the structure as written here. In the near future we will correct this page so that it follows the conventional definition.

• Prototype: γCuTi
• Pearson Symbol: tP4
• Strukturbericht Designation: B11
• Space Group: P4/nmm (Cartesian and lattice coordinate listings available)
• Number: 129
• Other Compounds with this Structure: AuCu, AlRe
• Primitive Vectors:  A1 = a X A2 = a Y A3 = c Z
• Basis Vectors:  B1 = - ¼ A1 + ¼ A2 + x1 A3 = - ¼ a X + ¼ a Y + x1 c Z (2c) (Cu) B2 = + ¼ A1 - ¼ A2 - x1 A3 = + ¼ a X - ¼ a Y - x1 c Z (2c) (Cu) B3 = - ¼ A1 + ¼ A2 + x2 A3 = - ¼ a X + ¼ a Y + x2 c Z (2c) (Ti) B4 = + ¼ A1 - ¼ A2 - x2 A3 = + ¼ a X - ¼ a Y - x2 c Z (2c) (Ti)

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 Structures indexed by: This is a mirror of an old page created at theNaval Research LaboratoryCenter for Computational Materials ScienceThe 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).