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A germanium clathrate compound doped with gallium antimonide has been synthesized and characterized. The structure of Ba 8 Ga 16 (GaSb) x Ge 30−2x with x=2 was determined using single-crystal X-ray analysis, and the Sb atoms were found to be selectively sited. A slight excess of antimony was confirmed by microprobe elemental analysis, resulting in uncompensated doping...
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