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Crystal structure of the Al₈Cr₅-type inter-metallic Al_7.85Cr_5.16.

ABSTRACT: An aluminium-deficient Al₈Cr₅-type inter-metallic with formula Al_7.85Cr_5.16 (octa-aluminium penta-chromium) was uncovered when high-pressure sinter-ing 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 Al₁₆Cr_9.5 and cubic Al₈Cr₅.

SUBMITTER: Geng X

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

REPOSITORIES: biostudies-literature

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

Geng Xu X Wen Bin B Fan Changzeng C

IUCrData 20200409 Pt 4

An aluminium-deficient Al8Cr5-type inter-metallic with formula Al7.85Cr5.16 (octa-aluminium penta-chromium) was uncovered when high-pressure sinter-ing 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 rhombohedr ...[more]

PMID: 36338303

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