1.
Acta Crystallogr B Struct Sci Cryst Eng Mater
; 74(Pt 4): 370-375, 2018 Aug 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-30141422
RESUMEN
During an investigation of the Mg-rich end of the Mg-Al-La system, a new ternary phase with the composition of (Al,Mg)3La was identified. The crystal structure of this phase was determined by conventional X-ray powder diffraction and transmission electron microscopy analysis and refined using high-resolution X-ray powder diffraction. The (Al,Mg)3La phase is found to have an orthorhombic structure with a space group of C2221 and lattice parameters of a = 4.3365â (1)â Å, b = 18.8674â (4)â Å and c = 4.4242â (1)â Å, which is distinctly different from the binary Al3La phase (P63/mmc). The resolved structure of the (Al,Mg)3La phase is further verified by high-angle annular dark-field scanning transmission electron microscopy.