Crystal structure of the Al(8)Cr(5)-type inter­metallic Al(7.85)Cr(5.16)

An aluminium-deficient Al(8)Cr(5)-type inter­metallic with formula Al(7.85)Cr(5.16) (octa­aluminium penta­chromium) was uncovered when high-pressure sinter­ing of a mixture with composition Al(11)Cr(4) was carried out. Structure analysis reveals that there are three co-occupied positions with refine...

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Detalles Bibliográficos
Autores principales: Geng, Xu, Wen, Bin, Fan, Changzeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2020
Materias:
Data Reports
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9462207/
https://www.ncbi.nlm.nih.gov/pubmed/36338303
http://dx.doi.org/10.1107/S2414314620004228
Descripción
Sumario:An aluminium-deficient Al(8)Cr(5)-type inter­metallic with formula Al(7.85)Cr(5.16) (octa­aluminium penta­chromium) was uncovered when high-pressure sinter­ing of a mixture with composition Al(11)Cr(4) 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 Al(8)Cr(5) ordered phase [Bradley & Lu (1937). Z. Kristallogr. 96, 20–37] and structurally closely related to the disordered phases of rhombohedral Al(16)Cr(9.5) and cubic Al(8)Cr(5). [Image: see text]

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