Crystal structure of the Al8Cr5-type inter­metallic Al7.85Cr5.16

ABSTRACT: An aluminium-deficient γ-brass phase, Al7.85Cr5.16, was synthesized by high-pressure sinter­ing and its crystal structure determined. An aluminium-deficient Al8Cr5-type inter­metallic with formula Al7.85Cr5.16 (octa­aluminium penta­chromium) was uncovered when high-pressure sinter­ing of a mixture with composition Al11Cr4 was carried out. Structure analysis reveals that there are three co-occupied positions with refined occupancy factors for Al atoms being 0.958, 0.772 and 1/2. The present phase is confirmed to be isotypic with the previously reported rhombohedral Al8Cr5 ordered phase [Bradley & Lu (1937). Z. Kristallogr.96, 20–37] and structurally closely related to the disordered phases of rhombohedral Al16Cr9.5 and cubic Al8Cr5.

SUBMITTER: Geng X 

PROVIDER: S-EPMC9462207 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature