Une surstructure de α-Ge, type diamant, induite par un dopage d'anti-moine.

ABSTRACT: Single crystals of anti-mony-doped germanium, Ge1-x Sb x+0.01 (x ≃ 0.0625), were grown by chemical transport reaction. The alloy crystallizes as a superstructure of diamond-type α-Ge. All atoms in the asymmetric unit lie on special positions and are characterized by strong covalent bonds. The anti-mony atoms substitute for one germanium atom at full occupancy at Wyckoff position 4a (site symmetry -43m), and are also at an adjacent tetra-hedral inter-stitial site with partially occupation (16%) at position 4c (or 4d) (site symmetry -43m). The structural model does not show close Sb⋯Sb contacts, and suggests that the inter-stitial anti-mony atoms move between the two adjacent tetra-hedral sites.

SUBMITTER: Herrero AG 

PROVIDER: S-EPMC5418777 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature