Experimental discovery of the L13 crystal structure

24 Apr 2014 - 12:30

Chumani Mshumi et al have published a paper in the prestigious journal Acta Materalia titled Revisiting the CuPt3 prototype and the L13 structure.

Experimentally and computationally, the structure of Pt-Cu at 1:3 stoichiometry has a convoluted history. The L13 structure has been predicted to occur in binary alloy systems, but has not been linked to experimental observations. Using a combination of electron diffraction, synchrotron x-ray powder diffraction, and Monte Carlo simulations, they demonstrated that it is present in the Cu-Pt system at 1:3 stoichiometry. They also find that the 4-atom, fcc superstructure L13 is equivalent to the large 32-atom orthorhombic superstructure reported in older literature, resolving much of the confusion surrounding this composition.