Abstract
In the simple eutectic GeSb system, a metastable phase GeSb with a tetragonally distorted NaClBl type structure ( a 0 = 5.87 4 Å; c 0 = 6.20 4 Å; c 0 a 0 = 1.05 6 ) has been prepared by rapid quenching from the melt (splat cooling). The solid solubility of Ge in Sb was enhanced from ∼8 at. % Ge in equilibrium to > 17 at. % Ge. GeSb represents a new structure type; its atomic configuration can be considered as intermediate between those of Sb and Ge. The tetragonal distortion is related to the presence of 7 bonding electrons per formula unit. A metastable GeSb phase diagram including GeSb is proposed.
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